{"title":"Hanna Instruments","description":"\u003cp\u003e\u003cstrong\u003eHanna Instruments aquarium testing equipment includes Checker colorimeters, matching reagent refills and the HI98319 marine salinity and temperature tester.\u003c\/strong\u003e The range brings digital measurements to aquarium water testing.\u003c\/p\u003e\u003cp\u003eChecker instruments display numerical results instead of relying on visual colour matching. The marine salinity tester measures conductivity to determine salinity, with temperature measurement in the same handheld instrument. Dedicated reagent refills support continued use of the corresponding Checker tests.\u003c\/p\u003e","products":[{"product_id":"hanna-hi782-25-nitrate-hr-checker-reagents","title":"Hanna HI782-25 Nitrate HR Checker Reagents","description":"\u003ch2\u003eHanna HI782-25 Nitrate HR Checker Reagents\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI782-25 Nitrate HR Checker Reagents\u003c\/strong\u003e are the official reagent refill for the Hanna Nitrate High Range Colorimeter HI782, made for testing marine water. Each pack holds enough reagent for 25 tests, so saltwater aquarium keepers in South Africa can keep their HI782 Checker running without a break in their testing routine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA dedicated refill matched to the Hanna HI782 Nitrate High Range Colorimeter.\u003c\/li\u003e\n\u003cli\u003eFormulated for marine water, so it suits saltwater aquarium testing rather than general-purpose use.\u003c\/li\u003e\n\u003cli\u003eEnough reagent for 25 tests, letting you track nitrate trends over many readings.\u003c\/li\u003e\n\u003cli\u003ePairs with Hanna's digital Checker format for a meter reading instead of guessing at colour-card shades.\u003c\/li\u003e\n\u003cli\u003eKeeps your existing HI782 meter in use, so there is no need to replace the instrument when reagents run out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse these reagents only with the Hanna HI782 Nitrate High Range Colorimeter on marine water samples. Follow the testing procedure set out for the HI782 Checker so that the reagent and meter work together as Hanna intends.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine and saltwater aquarium hobbyists who already own the Hanna HI782 Checker.\u003c\/li\u003e\n\u003cli\u003eReef and fish-only tanks where nitrate is checked regularly as part of water-quality management.\u003c\/li\u003e\n\u003cli\u003eAquarists who want to replenish their HI782 reagent supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for the Hanna Nitrate High Range Colorimeter HI782. This is the high range (HR) refill for marine water. It is not a standalone test kit and needs the HI782 meter to give a reading.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Hanna\u003c\/li\u003e\n\u003cli\u003eItem number: HI782-25\u003c\/li\u003e\n\u003cli\u003eParameter: Nitrate, High Range (HR)\u003c\/li\u003e\n\u003cli\u003eCompatible meter: Hanna HI782 Nitrate High Range Colorimeter\u003c\/li\u003e\n\u003cli\u003eSample type: Marine water\u003c\/li\u003e\n\u003cli\u003eNumber of tests: 25\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReagent refill for the Hanna HI782 Checker, enough for 25 tests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many tests can I run with the HI782-25 reagents?\u003c\/strong\u003e\u003cbr\u003eThe pack supplies enough reagent for 25 nitrate tests on the HI782 Nitrate High Range Colorimeter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use these reagents without the HI782 Checker?\u003c\/strong\u003e\u003cbr\u003eNo. They are a refill designed for the Hanna HI782 Nitrate High Range Colorimeter, and the meter is needed to take the reading.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these reagents for freshwater or saltwater tanks?\u003c\/strong\u003e\u003cbr\u003eThey are designed for marine water testing, so they are intended for saltwater aquariums.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the low range or high range nitrate refill?\u003c\/strong\u003e\u003cbr\u003eThis is the high range (HR) refill, made for the HI782 Nitrate High Range Colorimeter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat item number should I look for when reordering?\u003c\/strong\u003e\u003cbr\u003eThe item number is HI782-25. Checking it helps you get the right refill for your HI782 meter.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":39402228318262,"sku":"HI782-25","price":945.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/files\/hanna-hi782-25-nitrate-hr-checker-reagents-marine-water-refill-25-tests.jpg?v=1743701933"},{"product_id":"hanna-hi713-phosphate-low-range-colorimeter-checker","title":"Hanna HI713 Phosphate Low Range Colorimeter Fresh and Marine Checker","description":"\u003ch2\u003eHanna HI713 Phosphate Low Range Colorimeter Fresh and Marine Checker\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eHanna HI713 Phosphate Low Range Colorimeter Fresh and Marine Checker\u003c\/strong\u003e is a pocket-sized digital phosphate tester for fast, accurate on-the-spot readings in freshwater and marine aquariums. It is built for South African fishkeepers and reef hobbyists who want a precise, easy-to-read phosphate result without guessing at colour charts. Clear digital digits take the uncertainty out of testing, which helps anyone with poor eyesight or difficulty telling subtle colour changes apart.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital accuracy instead of colour matching:\u003c\/strong\u003e Large, easy-to-read digits replace the shade comparisons used in traditional chemical test kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-range sensitivity:\u003c\/strong\u003e Measures phosphate from 0.00 to 2.50 ppm (mg\/L) at a resolution of 0.01 ppm (mg\/L) across 250 points. That makes it well suited to tracking the low phosphate levels many aquarists aim for.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDependable precision:\u003c\/strong\u003e Accurate to ±0.04 ppm (mg\/L) ±4% of reading at 25°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridges the gap:\u003c\/strong\u003e Sits between basic chemical test kits and sophisticated professional equipment, offering laboratory-style accuracy at an affordable level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated to a single parameter:\u003c\/strong\u003e The checker measures phosphate only, so there are no menus or modes to work through.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-button operation:\u003c\/strong\u003e One button handles both Zero and Measure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery-saving auto shut-off:\u003c\/strong\u003e The checker switches itself off after 2 minutes of non-use and after a reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTruly portable:\u003c\/strong\u003e At roughly 65 g (2.3 oz), the Checker®HC fits easily in the palm of your hand or in a pocket. You can carry it between tanks, ponds-side setups or the fish room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecognised method:\u003c\/strong\u003e Based on an adaptation of Standard Method 4500-P E.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple power:\u003c\/strong\u003e Runs on a single AAA battery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTesting takes three straightforward steps:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 1, Zero:\u003c\/strong\u003e Fill a clean 10 mL glass cuvette with your aquarium water sample, insert it into the checker and press the button to calibrate (zero) the instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 2, Add reagent:\u003c\/strong\u003e Add the HI713 powder reagent to the water sample in the cuvette.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 3, Measure:\u003c\/strong\u003e Insert the vial back into the checker, press the button and read the phosphate result on the display.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor consistent accuracy, keep the vials clean. Residue, fingerprints or scratches on the glass can affect how light passes through the sample. Take the time to read the instructions and become familiar with the checker before your first test.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater aquariums\u003c\/li\u003e\n\u003cli\u003eMarine and reef aquariums\u003c\/li\u003e\n\u003cli\u003eHobbyists who find colour-change test kits difficult to read, including those with poor eyesight\u003c\/li\u003e\n\u003cli\u003eAquarists who want more accuracy than a basic chemical kit gives, without moving up to full professional laboratory equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned to work with HANNA's powder reagents\u003c\/li\u003e\n\u003cli\u003eUses 10 mL glass cuvettes\u003c\/li\u003e\n\u003cli\u003eReplacement reagents: HI713-25 Phosphate Checker Reagent Refill (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRange: 0.00 to 2.50 ppm (mg\/L)\u003c\/li\u003e\n\u003cli\u003eResolution: 0.01 ppm (mg\/L)\u003c\/li\u003e\n\u003cli\u003ePrecision: ±0.04 ppm (mg\/L) ±4% of reading @ 25°C\u003c\/li\u003e\n\u003cli\u003eLight source: LED @ 525 nm\u003c\/li\u003e\n\u003cli\u003eLight detector: Silicon photocell\u003c\/li\u003e\n\u003cli\u003eOperating environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing\u003c\/li\u003e\n\u003cli\u003eBattery type: (1) 1.5V AAA\u003c\/li\u003e\n\u003cli\u003eAuto-off: After 2 minutes of non-use and after read\u003c\/li\u003e\n\u003cli\u003eDimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5\")\u003c\/li\u003e\n\u003cli\u003eWeight: 64 g (2.25 oz)\u003c\/li\u003e\n\u003cli\u003eMethod: Adaptation of Standard Method 4500-P E\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x HI713 Low Range Phosphate Checker\u003c\/li\u003e\n\u003cli\u003e6x HI713 Reagent Packets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note: because of the specialised nature of this test kit, returns cannot be accepted. Make sure you understand and are comfortable with the checker before you purchase.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat phosphate range does the Hanna HI713 measure?\u003c\/strong\u003e\u003cbr\u003e\nIt reads from 0.00 to 2.50 ppm (mg\/L) in steps of 0.01 ppm. It is a low-range checker intended for the lower phosphate concentrations typical of well-maintained freshwater and marine aquariums.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use the HI713 on both my reef tank and my freshwater aquarium?\u003c\/strong\u003e\u003cbr\u003e\nYes. The HI713 is suitable for both freshwater and marine aquariums, so one checker covers both setups.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow many tests do I get, and what do I need for refills?\u003c\/strong\u003e\u003cbr\u003e\nThe checker comes with 6x HI713 reagent packets. When these run out, the replacement is the HI713-25 Phosphate Checker Reagent Refill. The checker is designed to work with HANNA's powder reagents.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill it work in a hot South African fish room or garage?\u003c\/strong\u003e\u003cbr\u003e\nThe checker operates between 0 and 50°C (32 and 122°F) at a maximum of 95% non-condensing relative humidity. Note that the stated precision of ±0.04 ppm ±4% of reading applies at 25°C.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat battery does it use, and does it switch itself off?\u003c\/strong\u003e\u003cbr\u003e\nIt runs on a single 1.5V AAA battery. It turns off automatically after 2 minutes of non-use and after a reading to save power.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I return the checker if it isn't right for me?\u003c\/strong\u003e\u003cbr\u003e\nNo. Because of the unique nature of this test kit, returns cannot be accepted. Please familiarise yourself with how it works before purchasing.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423488426292,"sku":"16151","price":3269.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi713-phosphate-low-range-colorimeter-checker-fresh-marine-aquarium-test-kit.jpg?v=1743694304"},{"product_id":"hanna-hi774-phosphate-ultra-low-range-ppm-colorimeter-marine-checker","title":"Hanna HI774 Phosphate Ultra Low Range PPM Colorimeter Marine Checker","description":"\u003ch2\u003eHanna HI774 Phosphate Ultra Low Range PPM Colorimeter Marine Checker\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI774 Phosphate Ultra Low Range PPM Colorimeter Marine Checker\u003c\/strong\u003e is a pocket-sized digital phosphate tester that measures phosphate accurately from 0.00 to 0.90 ppm in marine systems, including reef tanks. It is built for South African saltwater and reef keepers who want dependable, numerical phosphate readings to support long-term coral health without relying on colour-matching chemical kits.\u003c\/p\u003e\n\n\u003cp\u003eThe HI774 Ultra Low Range Phosphate Checker® is a cost-effective way to keep phosphate under control. Excessive phosphate can prevent calcification, skeletal formation and growth in many coral species, especially SPS (small-polyp stony) corals. High phosphate can also fuel nuisance algae in a reef tank. That algae often outcompetes sessile organisms for light, nutrients and space, which puts long-term coral health at risk.\u003c\/p\u003e\n\n\u003cp\u003ePhosphate testing is standard practice for saltwater aquariums. It gives you useful insight into your reef tank's water chemistry, and the HI774 ULR checker delivers an accurate 0.00 to 0.90 ppm reading in a few easy steps.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasier and more accurate than chemical test kits:\u003c\/strong\u003e You get a digital colorimeter reading instead of having to judge a colour chart by eye.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra low range resolution:\u003c\/strong\u003e It reads in 0.01 ppm steps, so you can track the small phosphate shifts that matter in SPS-dominated reefs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge, easy-to-read digits:\u003c\/strong\u003e Results are clear at a glance on the display.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto shut-off:\u003c\/strong\u003e The unit switches itself off to save battery life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated to a single parameter:\u003c\/strong\u003e It is set up only for ultra low range phosphate, so there are no menus or modes to navigate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall size, big convenience:\u003c\/strong\u003e It fits in the palm of your hand and is easy to store beside the tank or in a fish-room drawer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports coral health:\u003c\/strong\u003e It helps you spot phosphate levels that can hinder calcification and encourage nuisance algae before they become a bigger problem.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe checker uses 10 mL glass cuvettes. Two sample cuvettes with caps are supplied.\u003c\/li\u003e\n\u003cli\u003eIt is designed to work with HANNA's reagents. ULR reagent for 10 tests is included to get you started.\u003c\/li\u003e\n\u003cli\u003eFollow the supplied instructions and quick start guide for the full step-by-step testing procedure.\u003c\/li\u003e\n\u003cli\u003eOnce a result is displayed, the meter switches off 2 minutes after the reading. If you leave it idle, it switches off after 7 minutes of non-use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine aquariums and reef tanks\u003c\/li\u003e\n\u003cli\u003eReef keepers growing SPS (small-polyp stony) corals, which are particularly sensitive to excess phosphate\u003c\/li\u003e\n\u003cli\u003eAquarists troubleshooting nuisance algae growth in saltwater systems\u003c\/li\u003e\n\u003cli\u003eHobbyists who want to replace chemical colour-chart phosphate kits with a digital reading\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned to work with HANNA's reagents\u003c\/li\u003e\n\u003cli\u003eReagent refills: Hanna HI774-25\u003c\/li\u003e\n\u003cli\u003eUses 10 mL glass cuvettes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange:\u003c\/strong\u003e 0.00 to 0.90 ppm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResolution:\u003c\/strong\u003e 0.01 ppm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e ±0.02 ppm ±5% of reading\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight source:\u003c\/strong\u003e LED @ 525 nm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight detector:\u003c\/strong\u003e Silicon photocell\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMethod:\u003c\/strong\u003e Adaptation of Standard Method for Examination of Water and Wastewater, 20th edition, Ascorbic Acid method\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironment:\u003c\/strong\u003e 0 to 50°C (32 to 122°F); RH max 95% non-condensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery type:\u003c\/strong\u003e (1) 1.5V AAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-off:\u003c\/strong\u003e After 7 minutes of non-use and 2 minutes after reading\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 64 g (2.25 oz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHI774 Checker\u003c\/li\u003e\n\u003cli\u003e2 sample cuvettes with caps\u003c\/li\u003e\n\u003cli\u003eULR Reagent for 10 tests\u003c\/li\u003e\n\u003cli\u003eBattery\u003c\/li\u003e\n\u003cli\u003eInstructions\u003c\/li\u003e\n\u003cli\u003eQuick start guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease take the time to read about this test kit thoroughly and make sure you understand it before purchasing. Because of the unique nature of this product, returns cannot be accepted.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat phosphate range does the Hanna HI774 measure?\u003c\/strong\u003e\u003cbr\u003e\nIt measures phosphate from 0.00 to 0.90 ppm. Readings have a resolution of 0.01 ppm and an accuracy of ±0.02 ppm ±5% of reading, which makes it well suited to the low levels targeted in reef tanks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy should I test phosphate in my reef tank?\u003c\/strong\u003e\u003cbr\u003e\nExcess phosphate can prevent calcification, skeletal formation and growth in many corals, particularly SPS. It can also drive nuisance algae that competes with sessile organisms for light, nutrients and space.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow many tests do I get, and what refills do I need?\u003c\/strong\u003e\u003cbr\u003e\nThe kit includes ULR reagent for 10 tests. After that, use Hanna HI774-25 reagent refills, as the checker is designed to work with HANNA's reagents.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat battery does it use, and does it switch off automatically?\u003c\/strong\u003e\u003cbr\u003e\nIt runs on one 1.5V AAA battery, which is included. It switches off after 7 minutes of non-use and 2 minutes after a reading.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill it cope with South African summer temperatures?\u003c\/strong\u003e\u003cbr\u003e\nThe HI774 is rated to operate from 0 to 50°C (32 to 122°F), at up to 95% relative humidity non-condensing. Keep it out of condensation, for example away from steam or splashes around the sump.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I return the checker if I change my mind?\u003c\/strong\u003e\u003cbr\u003e\nNo. Because of the unique nature of this test kit, returns cannot be accepted, so please make sure you understand how it works before purchasing.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423521194292,"sku":"16152","price":3269.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi774-phosphate-ultra-low-range-colorimeter-marine-checker-ppm-measurement_1.jpg?v=1743694297"},{"product_id":"hanna-hi772-alkalinity-dkh-colorimeter-marine-checker","title":"Hanna HI772 Alkalinity dKH Colorimeter Marine Checker","description":"\u003ch2\u003eHanna HI772 Alkalinity dKH Colorimeter Marine Checker\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI772 Alkalinity dKH Colorimeter Marine Checker\u003c\/strong\u003e is a compact, pocket-sized colorimeter that measures alkalinity in dKH in marine aquariums. It is designed for South African reef keepers and saltwater hobbyists who want electronic readings they can repeat, rather than trying to judge a colour change by eye. Hanna has updated this Checker to report in dKH, the alkalinity unit most commonly used in the aquarium hobby, so there is no conversion to do.\u003c\/p\u003e\n\n\u003cp\u003eAlkalinity is one of the parameters marine aquarists test most often. The HI772 sits between simple chemical test kits and professional laboratory instruments. It gives you accurate, dependable readings in a handheld unit that is easy to use. Results appear on a large LCD display that is easy to read, even in a dim fish room or cabinet. Replacement reagents can be bought separately as needed, so the Checker keeps working long after the first bottle runs out.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads directly in dKH:\u003c\/strong\u003e Results appear in the unit reef keepers use day to day, so you can compare them with your targets and dosing records straight away.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore reliable than chemical test kits:\u003c\/strong\u003e Chemical and titration kits have limited accuracy and are hard to repeat. They usually depend on the human eye and the room lighting to decide the result. The HI772 removes that guesswork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRepeatable results:\u003c\/strong\u003e A single light source at a fixed wavelength lets the Checker take repeatable measurements time after time. This makes it easier to spot real trends in your tank's alkalinity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaboratory-style method:\u003c\/strong\u003e Laboratories and large-scale testing facilities use similar colorimetric devices because their measurements are dependable and precise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated to a single parameter:\u003c\/strong\u003e Hanna does not build one unit to test everything. Each Checker is designed for one parameter, which gives the test greater precision and makes the device simpler to use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge LCD display:\u003c\/strong\u003e The digital readout is easy to read at a glance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall size, big convenience:\u003c\/strong\u003e At around 65 g (2.3 oz), the Checker fits easily in the palm of your hand or in a pocket, ready for quick, accurate on-the-spot tests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-button operation:\u003c\/strong\u003e One button handles both zeroing and measuring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery powered:\u003c\/strong\u003e It runs on a single AAA battery, with auto-off to save power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefillable reagents:\u003c\/strong\u003e It uses Hanna HI772-26 liquid reagents, which you can buy as replacements when you need them.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGetting a result takes three simple steps:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 1, zero:\u003c\/strong\u003e Fill a clean cuvette with your aquarium water sample and zero the instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 2, add reagent:\u003c\/strong\u003e Add the HI772-26 alkalinity reagent to the sample.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 3, measure:\u003c\/strong\u003e Place the vial into the Checker, press the button and read the dKH result on the display.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Keep the vials clean. This is essential with all Hanna Checkers and is key to consistent, dependable results. Read the included instructions and quick start guide before your first test.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine reef aquariums where alkalinity (dKH) is monitored regularly\u003c\/li\u003e\n\u003cli\u003eSaltwater hobbyists moving up from chemical or titration test kits to electronic testing\u003c\/li\u003e\n\u003cli\u003eAquarists who want repeatable readings to track alkalinity trends over time\u003c\/li\u003e\n\u003cli\u003eQuick on-the-spot checks at the tank, in the fish room or on the go\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe HI772 Checker is designed for Hanna HI772-26 liquid alkalinity reagents. Its operating range of 0 to 50°C (32 to 122°F) and maximum relative humidity of 95% (non-condensing) comfortably cover typical South African fish rooms and living spaces.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eParameter: Alkalinity (marine), reported in dKH\u003c\/li\u003e\n\u003cli\u003eRange: 0.0 to 20.0 dKH\u003c\/li\u003e\n\u003cli\u003eResolution: 0.1 dKH\u003c\/li\u003e\n\u003cli\u003ePrecision: ±0.3 dKH ±5% of reading\u003c\/li\u003e\n\u003cli\u003eMethod: Colorimetric method\u003c\/li\u003e\n\u003cli\u003eLight source: LED @ 610 nm\u003c\/li\u003e\n\u003cli\u003eLight detector: Silicon photocell\u003c\/li\u003e\n\u003cli\u003eEnvironment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing\u003c\/li\u003e\n\u003cli\u003eBattery type: (1) 1.5V AAA\u003c\/li\u003e\n\u003cli\u003eAuto-off: After 10 minutes of non-use and after a reading\u003c\/li\u003e\n\u003cli\u003eDimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5\")\u003c\/li\u003e\n\u003cli\u003eWeight: 64 g (2.25 oz)\u003c\/li\u003e\n\u003cli\u003eReagent: Hanna HI772-26 liquid reagents\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHI772 Checker\u003c\/li\u003e\n\u003cli\u003e2 sample cuvettes with caps\u003c\/li\u003e\n\u003cli\u003e1 bottle of alkalinity reagent HI772-26\u003c\/li\u003e\n\u003cli\u003e1 ml syringe and tip\u003c\/li\u003e\n\u003cli\u003eBattery\u003c\/li\u003e\n\u003cli\u003eInstructions\u003c\/li\u003e\n\u003cli\u003eQuick start guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat alkalinity range can the Hanna HI772 measure?\u003c\/strong\u003e\u003cbr\u003e\nIt measures from 0.0 to 20.0 dKH, with a resolution of 0.1 dKH and a precision of ±0.3 dKH ±5% of reading.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy choose an electronic Checker over a drop-test alkalinity kit?\u003c\/strong\u003e\u003cbr\u003e\nChemical and titration kits rely on your eye and the room lighting to read a colour change, which limits accuracy and makes results hard to repeat. The HI772 uses a single LED light source at a fixed 610 nm wavelength and a silicon photocell, so its readings are repeatable from test to test.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich reagent does the HI772 use, and can I get refills?\u003c\/strong\u003e\u003cbr\u003e\nIt uses Hanna HI772-26 liquid reagents. One bottle comes in the box, and replacement reagents can be bought separately when you need them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat power does the Checker need?\u003c\/strong\u003e\u003cbr\u003e\nIt runs on one 1.5V AAA battery, and a battery is included. To save power, the unit switches off automatically after 10 minutes of non-use and after a reading.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I keep my readings consistent?\u003c\/strong\u003e\u003cbr\u003e\nKeep the cuvettes clean, as this is essential for consistent, dependable results with Hanna Checkers. Always zero the instrument with your own water sample before adding the reagent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I return the HI772 if it is not right for me?\u003c\/strong\u003e\u003cbr\u003e\nNo. Because of the nature of this test kit, returns cannot be accepted. Please take the time to read about the Checker thoroughly and familiarise yourself with how it works before purchasing.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423567823156,"sku":"16153","price":3269.0,"currency_code":"ZAR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi772-alkalinity-dkh-colorimeter-marine-checker-aquarium-tool_1.jpg?v=1743694279"},{"product_id":"hanna-hi774-25-phosphate-ulr-reagents-marine-water","title":"Hanna HI774-25 Phosphate ULR Reagents Marine Water","description":"\u003ch2\u003eHanna HI774-25 Phosphate ULR Reagents Marine Water\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI774-25 Phosphate ULR Reagents Marine Water\u003c\/strong\u003e are refill reagents for measuring phosphate levels in saltwater with Hanna's handheld Phosphate ULR ppm Colorimeter HI774 and the Marine Master HI97105 Multiparameter Photometer. They are made for reef keepers and marine aquarists who already own one of these Hanna meters and want to keep testing. Each pack contains 25 packets of reagent.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePhosphate Ultra Low Range (ULR) chemistry for tracking the low phosphate levels marine hobbyists aim to keep in their systems.\u003c\/li\u003e\n\u003cli\u003eFormulated specifically for marine water, so you can use it in reef tanks, fish-only saltwater systems and marine holding systems.\u003c\/li\u003e\n\u003cli\u003eRefill pack for two Hanna instruments, so one reagent covers whichever compatible meter you own.\u003c\/li\u003e\n\u003cli\u003ePairs with the easy-to-use, handheld HI774 Checker HC for quick phosphate checks at the tank.\u003c\/li\u003e\n\u003cli\u003eRegular testing gives you hard numbers to act on when you adjust feeding, filtration, water changes or phosphate-removal media.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse these reagent packets with your Hanna HI774 Phosphate ULR Checker HC or HI97105 Marine Master photometer. Follow the testing procedure in your meter's instructions to take a phosphate reading from your marine water sample.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine and reef aquarium owners monitoring phosphate\u003c\/li\u003e\n\u003cli\u003eSaltwater hobbyists checking their source water and tank water\u003c\/li\u003e\n\u003cli\u003eOwners of the Hanna HI774 or HI97105 who need replacement reagents\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHanna Phosphate ULR ppm Colorimeter HI774 (Hanna Checker HC – Marine Water)\u003c\/li\u003e\n\u003cli\u003eHanna Marine Master HI97105 Multiparameter Photometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e25 packets of Hanna Phosphate ULR reagent for marine water\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich meters do the HI774-25 reagents work with?\u003c\/strong\u003e\u003cbr\u003e\nThey are refills for the Hanna Phosphate ULR ppm Colorimeter HI774 (Checker HC – Marine Water) and the Hanna Marine Master HI97105 Multiparameter Photometer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat does \"ULR\" mean?\u003c\/strong\u003e\u003cbr\u003e\nULR stands for Ultra Low Range. The reagent is designed for measuring the very low phosphate levels that marine aquarists usually try to keep.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use these reagents in a freshwater aquarium or pond?\u003c\/strong\u003e\u003cbr\u003e\nThese reagents are labelled for marine water. If you need to test freshwater or a pond, choose a Hanna reagent intended for that application.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow many packets come in a pack?\u003c\/strong\u003e\u003cbr\u003e\nEach HI774-25 pack contains 25 packets of reagent.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy should South African reef keepers test phosphate regularly?\u003c\/strong\u003e\u003cbr\u003e\nPhosphate can build up from feeding and from the source water. Regular readings let you see how your tank is trending, so you can adjust feeding, water changes or filtration with confidence.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this pack include a meter?\u003c\/strong\u003e\u003cbr\u003e\nNo. The HI774-25 is a reagent refill only. You need a compatible Hanna HI774 or HI97105 instrument to take readings.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423591809332,"sku":"16154","price":569.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi774-25-phosphate-ultra-low-range-reagents-marine-water-colorimeter-refills-25-packets.jpg?v=1743694267"},{"product_id":"hanna-hi713-25-phosphate-checker-reagents-marine-and-fresh-water","title":"Hanna HI713-25 Phosphate Checker Reagents Marine and Fresh Water","description":"\u003ch2\u003eHanna HI713-25 Phosphate Checker Reagents Marine and Fresh Water\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI713-25 Phosphate Checker Reagents Marine and Fresh Water\u003c\/strong\u003e are phosphate reagent refills for the handheld Hanna Low Range Phosphate Checker HI713. Each set provides reagents for 25 tests, so aquarium and pond keepers can keep checking phosphate without interruption. They are suitable for both marine and freshwater use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRefills your Hanna HI713 Low Range Phosphate Checker so you can keep testing.\u003c\/li\u003e\n\u003cli\u003eProvides enough reagents for 25 phosphate tests.\u003c\/li\u003e\n\u003cli\u003eWorks in both saltwater and freshwater, so one refill covers reef tanks, marine fish-only systems and freshwater aquariums.\u003c\/li\u003e\n\u003cli\u003eDesigned to pair with the easy-to-use handheld HI713 Checker, a compact way to monitor phosphate at home.\u003c\/li\u003e\n\u003cli\u003eRegular phosphate checks help hobbyists spot rising nutrient levels and adjust water changes, feeding or filtration before problems build up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse these reagents with the Hanna HI713 Low Range Phosphate Checker. Follow the testing procedure for the HI713 Checker for each of your 25 tests.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine aquariums, including reef and fish-only systems\u003c\/li\u003e\n\u003cli\u003eFreshwater aquariums\u003c\/li\u003e\n\u003cli\u003eHobbyists who already own the Hanna HI713 Phosphate Checker and need replacement reagents\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese refills are made for the Hanna Low Range Phosphate Checker HI713. Check your meter's model number before ordering to make sure it is an HI713.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Hanna\u003c\/li\u003e\n\u003cli\u003eProduct code: HI713-25\u003c\/li\u003e\n\u003cli\u003eParameter: Phosphate (low range)\u003c\/li\u003e\n\u003cli\u003eWater type: Marine and fresh water\u003c\/li\u003e\n\u003cli\u003eNumber of tests: 25\u003c\/li\u003e\n\u003cli\u003eCompatible with: Hanna HI713 Low Range Phosphate Checker\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePhosphate reagents for 25 tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the HI713-25 include the Phosphate Checker?\u003c\/strong\u003e\u003cbr\u003eNo. The HI713-25 is a reagent refill for the Hanna HI713 Low Range Phosphate Checker. You need an HI713 Checker to use it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many tests do I get from one set?\u003c\/strong\u003e\u003cbr\u003eEach HI713-25 set provides reagents for 25 phosphate tests.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use these reagents in my reef tank and my freshwater tank?\u003c\/strong\u003e\u003cbr\u003eYes. The HI713-25 reagents are intended for both marine and fresh water, so one refill covers both types of system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these reagents work with other Hanna Checker models?\u003c\/strong\u003e\u003cbr\u003eThey are designed for the Hanna Low Range Phosphate Checker HI713. Other Hanna Checkers use their own dedicated reagents, so match the reagent code to your meter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy should South African fishkeepers test for phosphate?\u003c\/strong\u003e\u003cbr\u003eExcess phosphate is a common driver of nuisance algae in aquariums. Testing both your tank water and your tap or source water with the HI713 Checker shows where phosphate is coming from, so you can adjust water changes, feeding or filtration.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423615762740,"sku":"16155","price":499.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi713-25-phosphate-checker-reagents-marine-fresh-water.jpg?v=1743694222"},{"product_id":"hanna-hi772-26-alkalinity-marine-checker-reagents","title":"Hanna HI772-26 Alkalinity Marine Checker Reagents","description":"\u003ch2\u003eHanna HI772-26 Alkalinity Marine Checker Reagents\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI772-26 Alkalinity Marine Checker Reagents\u003c\/strong\u003e are a reagent refill for measuring alkalinity in seawater with compatible Hanna instruments. They are for reef keepers, marine aquarists and anyone already using a Hanna Checker HC or Marine Master photometer who needs to keep testing alkalinity. Each refill provides enough reagent for 25 tests.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLets you keep testing alkalinity on your existing Hanna meter without replacing the instrument.\u003c\/li\u003e\n\u003cli\u003eFormulated for seawater, so it is intended for marine and reef aquarium samples.\u003c\/li\u003e\n\u003cli\u003eWorks across three Hanna instruments: the HI772 and HI755 Checker HC models and the Marine Master HI97105.\u003c\/li\u003e\n\u003cli\u003eSupplies enough reagent for 25 alkalinity tests per refill.\u003c\/li\u003e\n\u003cli\u003eHaving a spare refill on hand means you do not have to stop routine testing while you wait for local delivery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse these reagents with your compatible Hanna instrument and follow that instrument's testing procedure for alkalinity. Test samples taken from your marine aquarium or saltwater system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine and reef aquarium hobbyists who monitor alkalinity in seawater.\u003c\/li\u003e\n\u003cli\u003eOwners of a Hanna Checker HC Marine Water or Marine Master photometer who need replacement reagents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHanna HI772 Alkalinity Checker HC (Marine Water)\u003c\/li\u003e\n\u003cli\u003eHanna HI755 Alkalinity Checker HC (Marine Water)\u003c\/li\u003e\n\u003cli\u003eHanna Marine Master HI97105 Multiparameter Photometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Hanna\u003c\/li\u003e\n\u003cli\u003eProduct code: HI772-26\u003c\/li\u003e\n\u003cli\u003eParameter: alkalinity\u003c\/li\u003e\n\u003cli\u003eSample type: seawater\u003c\/li\u003e\n\u003cli\u003eNumber of tests: 25\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlkalinity reagent refill, enough for 25 tests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich Hanna meters can I use these reagents with?\u003c\/strong\u003e\u003cbr\u003e\nThey are compatible with the HI772 and HI755 Hanna Checker HC Marine Water and the Marine Master HI97105 Multiparameter Photometer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many tests will I get from one refill?\u003c\/strong\u003e\u003cbr\u003e\nEach HI772-26 refill provides enough reagent for 25 alkalinity tests.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Checker meter included?\u003c\/strong\u003e\u003cbr\u003e\nNo. This is a reagent refill only. It is intended for people who already own one of the compatible Hanna instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use these reagents to test freshwater?\u003c\/strong\u003e\u003cbr\u003e\nThese reagents are designed for testing alkalinity in seawater. They are intended for marine and reef aquariums, not freshwater tanks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy keep a spare refill in stock?\u003c\/strong\u003e\u003cbr\u003e\nReef keepers often track alkalinity regularly. Keeping a spare 25-test refill means you can keep testing without waiting for a new order to arrive.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423655444788,"sku":"16156","price":499.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi772-26-seawater-alkalinity-checker-reagents-refill-25-tests.jpg?v=1743694219"},{"product_id":"hanna-hi98319-marine-salinity-tester","title":"Hanna HI98319 Marine Salinity and Temperature Tester","description":"\u003ch2\u003eHanna HI98319 Marine Salinity and Temperature Tester\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI98319 Marine Salinity and Temperature Tester\u003c\/strong\u003e is a pocket-sized digital meter that measures both the salinity and the temperature of natural and artificial seawater in aquariums. It is built for South African reef keepers and marine fishkeepers who want a quick, clear digital reading instead of squinting at a refractometer scale. Readings appear within seconds on an easy-to-read LCD screen.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital salinity testing by conductivity:\u003c\/strong\u003e the tester measures electrical conductivity (EC) to work out the salinity of natural or artificial seawater. This means there is no fuzzy blue line to interpret, which many hobbyists find hard to see on traditional refractometers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResults in seconds:\u003c\/strong\u003e salinity and temperature are measured together and shown on the LCD within moments of dipping the probe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic temperature compensation:\u003c\/strong\u003e the tester uses its own temperature reading to correct the salinity value before displaying it. Compensation works automatically from 5 to 50.0°C (41 to 122°F), which is useful in South Africa's warm summers and cooler winters, when tank temperatures can drift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree salinity units at the press of a button:\u003c\/strong\u003e you can cycle between the three most common salinity measurements:\n\u003cul\u003e\n\u003cli\u003eppt (parts per thousand)\u003c\/li\u003e\n\u003cli\u003ePSU (practical salinity units)\u003c\/li\u003e\n\u003cli\u003eS.G. (specific gravity)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraphite sensors:\u003c\/strong\u003e these reduce polarisation effects, helping readings stay consistent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast, accurate temperature readings:\u003c\/strong\u003e the tester doubles as a handy check on your heater or chiller performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable auto-off:\u003c\/strong\u003e the meter switches itself off to prolong battery life, giving approximately 100 hours of continuous use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePocket-sized:\u003c\/strong\u003e it is easy to carry between tanks, to a fish club meeting or to your local aquarium shop when checking freshly mixed saltwater.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration solutions included:\u003c\/strong\u003e 35 ppt calibration standard sachets come in the box so you can keep readings correct from day one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA more stable environment for your livestock:\u003c\/strong\u003e keeping salinity steady in your reef tank lets fish and corals put their energy into growing, rather than constantly adjusting to salinity swings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCalibrate the tester using one of the supplied 35 ppt calibration standard sachets. The meter performs an automatic single-point calibration at 35.00 ppt. Once calibrated, place the sensor in a sample of your aquarium or freshly mixed seawater. The HI98319 measures conductivity and temperature, applies automatic temperature compensation, and displays the result on the LCD within seconds. Use the unit button to switch between ppt, PSU and S.G. to match the scale you or your salt mix instructions use. Refer to the included instruction manual for full operating and calibration steps.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTesting salinity in any saltwater aquarium, including reef tanks, fish-only marine systems and coral setups.\u003c\/li\u003e\n\u003cli\u003eMeasuring natural seawater as well as artificial seawater mixed from synthetic sea salt.\u003c\/li\u003e\n\u003cli\u003eChecking new saltwater before water changes, and monitoring top-off and evaporation effects.\u003c\/li\u003e\n\u003cli\u003eHobbyists who find refractometers difficult to read or who simply want a faster, simpler testing routine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement method:\u003c\/strong\u003e electrical conductivity (EC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSalinity range:\u003c\/strong\u003e 0.0 to 70.0 ppt (g\/L); 0.0 to 70.0 PSU; 1.000 to 1.041 S.G.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSalinity resolution:\u003c\/strong\u003e 0.1 ppt (g\/L); 0.1 PSU; 0.001 S.G.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSalinity accuracy (at 25°C\/77°F):\u003c\/strong\u003e ±1 ppt for 0.0 to 40.0 ppt (±2 ppt for readings over 40.0 ppt); ±1 PSU for 0.0 to 40.0 PSU (±2 PSU for readings over 40.0 PSU); ±0.001 S.G.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e 0.0 to 50.0°C (32.0 to 122.0°F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature resolution:\u003c\/strong\u003e 0.1°C (0.1°F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature accuracy (at 25°C\/77°F):\u003c\/strong\u003e ±0.5°C (±1°F)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSalinity calibration:\u003c\/strong\u003e automatic, single point at 35.00 ppt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature compensation:\u003c\/strong\u003e automatic from 5 to 50.0°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensors:\u003c\/strong\u003e graphite, to reduce polarisation effects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e easy-to-read LCD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e CR2032\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery life:\u003c\/strong\u003e approximately 100 hours of continuous use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-off:\u003c\/strong\u003e selectable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating environment:\u003c\/strong\u003e 0 to 50°C (32 to 122°F), RH max 100%\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x HI98319 Marine Salinity Tester\u003c\/li\u003e\n\u003cli\u003e1 x CR2032 battery (installed)\u003c\/li\u003e\n\u003cli\u003e1 x storage case\u003c\/li\u003e\n\u003cli\u003e4 x 35 ppt calibration standard sachets\u003c\/li\u003e\n\u003cli\u003e1 x instruction manual\u003c\/li\u003e\n\u003cli\u003e1 x quality certificate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease take time to read about this tester and make sure you are familiar with it before purchasing. Because of the unique nature of this product, returns cannot be accepted.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow is this different from using a refractometer?\u003c\/strong\u003e\u003cbr\u003e\nA refractometer requires you to read where a blue line falls on a scale, and many people find that line fuzzy. The HI98319 measures electrical conductivity and shows a temperature-compensated digital value on an LCD within seconds, so there is nothing to interpret.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich salinity units does it display?\u003c\/strong\u003e\u003cbr\u003e\nYou can cycle between ppt (0.0 to 70.0, 0.1 resolution), PSU (0.0 to 70.0, 0.1 resolution) and specific gravity (1.000 to 1.041, 0.001 resolution).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I calibrate it, and are calibration solutions included?\u003c\/strong\u003e\u003cbr\u003e\nCalibration is an automatic single-point process at 35.00 ppt. Four 35 ppt calibration standard sachets are supplied in the box.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes tank temperature affect the salinity reading?\u003c\/strong\u003e\u003cbr\u003e\nThe tester automatically compensates for temperature from 5 to 50.0°C using its own built-in temperature reading. This helps keep results comparable whether your tank runs warm in a Highveld or Durban summer or cooler in winter. Stated salinity accuracy is measured at 25°C\/77°F.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat battery does it use, and how long does it last?\u003c\/strong\u003e\u003cbr\u003e\nIt runs on a CR2032 battery, which comes already installed. The battery lasts approximately 100 hours of continuous use, and the selectable auto-off feature helps stretch that further.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I return the tester if I change my mind?\u003c\/strong\u003e\u003cbr\u003e\nNo. Because of the unique nature of this product, returns are not accepted, so please familiarise yourself with its features and specifications before ordering.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423695814964,"sku":"16157","price":4315.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi98319-marine-salinity-and-temperature-tester-aquarium-water-quality-monitor.jpg?v=1743694216"},{"product_id":"hanna-hi758-calcium-colorimeter-marine-checker","title":"Hanna HI758 Calcium Colorimeter Marine Checker","description":"\u003ch2\u003eHanna HI758 Calcium Colorimeter Marine Checker\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI758 Calcium Colorimeter Marine Checker\u003c\/strong\u003e is a handheld digital calcium tester that accurately measures the calcium level in reef aquariums. It is built for South African reef keepers who want more dependable readings than a colour-match chemical kit, without the cost or complexity of laboratory equipment. You get a clear digital result in three simple steps.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridges the gap between kits and lab instruments:\u003c\/strong\u003e Hanna designed the Calcium Checker to sit between basic chemical test kits and professional instrumentation. It is accurate, affordable and easy to use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMore accurate and easier than chemical test kits:\u003c\/strong\u003e The photometer reads the sample itself, so you don't have to judge colour shades by eye under varying room lighting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDedicated to a single parameter:\u003c\/strong\u003e This Checker measures calcium only. It is calibrated to work with Hanna's own liquid reagents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReef-relevant range:\u003c\/strong\u003e It measures from 200 to 600 ppm with 1 ppm (mg\/L) resolution, which covers the levels reef keepers monitor for corals, clams and coralline algae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-button operation:\u003c\/strong\u003e One button handles both zeroing and measuring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePocket-sized:\u003c\/strong\u003e At around 65 g (2.3 oz), the Checker HC fits in the palm of your hand or a pocket. It suits quick, accurate on-the-spot analysis at the tank, the sump or a fellow hobbyist's system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRuns on one AAA battery:\u003c\/strong\u003e It uses a single 1.5V AAA battery and switches itself off automatically to save power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise sample handling:\u003c\/strong\u003e The two-stage, spring-loaded MiniPipette measures the small tank-water sample the test needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTesting takes three steps:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 1, zero:\u003c\/strong\u003e Zero the instrument using your water sample.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 2, add reagent:\u003c\/strong\u003e Add the Hanna calcium reagent to the vial.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 3, read:\u003c\/strong\u003e Place the vial into the Calcium Checker, press the button and read the result on the display.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eUsing the MiniPipette:\u003c\/strong\u003e The MiniPipette has a two-stage plunger for accurately dispensing the 0.1 mL tank-water sample. It is spring-loaded and draws up and releases 100 µL.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAttach the pipette tip.\u003c\/li\u003e\n\u003cli\u003ePress the button down until it reaches the first stop.\u003c\/li\u003e\n\u003cli\u003ePlace the tip into your tank-water sample and let the plunger spring back up slowly to draw in the sample.\u003c\/li\u003e\n\u003cli\u003eMove the pipette to your testing vial and press the plunger down to the first stop to dispense the liquid.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTips for accurate results:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse Hanna HI70436 Deionised Water.\u003c\/li\u003e\n\u003cli\u003eMake sure the testing vials are clean and free of debris.\u003c\/li\u003e\n\u003cli\u003eThe outside of each vial must be dry and free of fingerprints before it goes into the meter.\u003c\/li\u003e\n\u003cli\u003eDon't shake the vial hard. Violent shaking creates microbubbles that can affect the reading.\u003c\/li\u003e\n\u003cli\u003eDon't let the sample stand too long before you take the reading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eDosage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTank-water sample: 0.1 mL (100 µL), dispensed with the MiniPipette.\u003c\/li\u003e\n\u003cli\u003eReagent: Hanna HI758-26 Calcium Checker Reagents, added after zeroing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReef tanks and other saltwater systems where calcium levels need regular monitoring.\u003c\/li\u003e\n\u003cli\u003eReef keepers who dose calcium and want to track their parameters closely.\u003c\/li\u003e\n\u003cli\u003eHobbyists who want to move up from chemical test kits to a digital photometer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for Hanna's liquid reagents. Replacement reagents: HI758-26 Calcium Checker Reagents.\u003c\/li\u003e\n\u003cli\u003eUses 10 mL (0.34 fl oz) glass cuvettes.\u003c\/li\u003e\n\u003cli\u003eRecommended rinse and preparation water: Hanna HI70436 Deionised Water.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRange: 200 to 600 ppm\u003c\/li\u003e\n\u003cli\u003eResolution: 1 ppm (mg\/L)\u003c\/li\u003e\n\u003cli\u003ePrecision: ±6% of reading\u003c\/li\u003e\n\u003cli\u003eLight source: LED @ 610 nm\u003c\/li\u003e\n\u003cli\u003eLight detector: Silicon photocell\u003c\/li\u003e\n\u003cli\u003eMethod: Adaptation of the zincon method\u003c\/li\u003e\n\u003cli\u003eOperating environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing\u003c\/li\u003e\n\u003cli\u003eBattery type: (1) 1.5V AAA\u003c\/li\u003e\n\u003cli\u003eAuto-off: After 10 minutes of non-use and after a reading\u003c\/li\u003e\n\u003cli\u003eDimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5\")\u003c\/li\u003e\n\u003cli\u003eWeight: 64 g (2.25 oz)\u003c\/li\u003e\n\u003cli\u003eCuvettes: 10 mL (0.34 fl oz) glass\u003c\/li\u003e\n\u003cli\u003eOperation: Single button (zero and measure)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Please take time to understand this test kit fully before you purchase. Because of the nature of this product, returns cannot be accepted.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat calcium range does the Hanna HI758 measure?\u003c\/strong\u003e\u003cbr\u003eIt reads from 200 to 600 ppm, with 1 ppm (mg\/L) resolution and a precision of ±6% of reading.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich reagents do I need for refills?\u003c\/strong\u003e\u003cbr\u003eUse Hanna HI758-26 Calcium Checker Reagents. The Checker is designed specifically for Hanna's liquid reagents.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much tank water does each test use?\u003c\/strong\u003e\u003cbr\u003eEach test uses 0.1 mL (100 µL) of tank water. The spring-loaded, two-stage MiniPipette measures and dispenses this volume.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are my readings inconsistent?\u003c\/strong\u003e\u003cbr\u003eCheck that the vials are clean, dry on the outside and free of fingerprints. Mix gently rather than shaking hard, because microbubbles affect the result. Read the sample promptly, and use Hanna HI70436 Deionised Water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it handle warm South African summers in the fish room?\u003c\/strong\u003e\u003cbr\u003eThe Checker operates from 0 to 50°C (32 to 122°F) at up to 95% non-condensing relative humidity, which covers typical home and fish-room conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I return the Checker if it isn't right for me?\u003c\/strong\u003e\u003cbr\u003eNo. Because of the nature of this product, returns cannot be accepted, so please read up on how the test kit works before you purchase.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423744278836,"sku":"16158","price":3269.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi758-calcium-colorimeter-marine-checker-reef-tank-calcium-level-testing-meter.jpg?v=1743694202"},{"product_id":"hanna-hi758-26-calcium-checker-reagents","title":"Hanna HI758-26 Calcium Checker Reagents","description":"\u003ch2\u003eHanna HI758-26 Calcium Checker Reagents\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI758-26 Calcium Checker Reagents\u003c\/strong\u003e are refill reagent packets for measuring calcium in marine aquarium water with the handheld Hanna Calcium Checker or the Marine Master HI97105 Multiparameter Photometer. They are for South African reef and saltwater hobbyists who already own one of these Hanna meters and want to keep calcium testing going without interruption.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Hanna calcium reagent refills made for the Hanna Calcium Checker and the Marine Master HI97105 photometer.\u003c\/li\u003e\n\u003cli\u003eIndividual reagent packets, so each test uses its own portion of reagent.\u003c\/li\u003e\n\u003cli\u003eEnough reagent for 26 tests per pack.\u003c\/li\u003e\n\u003cli\u003eKeeps your handheld checker or photometer ready for routine calcium checks on your marine system.\u003c\/li\u003e\n\u003cli\u003eWorks with the easy-to-use handheld Hanna Calcium Checker for simple testing at home.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse these packets as the calcium reagent when testing with your Hanna Calcium Checker or Marine Master HI97105 Multiparameter Photometer. Follow the testing procedure in your meter's instructions for sample preparation, reagent addition and reading.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMarine and reef aquarium keepers who monitor calcium levels.\u003c\/li\u003e\n\u003cli\u003eOwners of the Hanna Calcium Checker who need replacement reagents.\u003c\/li\u003e\n\u003cli\u003eUsers of the Hanna Marine Master HI97105 Multiparameter Photometer running calcium tests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHanna Calcium Checker (handheld)\u003c\/li\u003e\n\u003cli\u003eHanna Marine Master HI97105 Multiparameter Photometer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Hanna\u003c\/li\u003e\n\u003cli\u003eModel: HI758-26\u003c\/li\u003e\n\u003cli\u003eParameter: Calcium (marine)\u003c\/li\u003e\n\u003cli\u003eFormat: Individual reagent packets\u003c\/li\u003e\n\u003cli\u003eTest quantity: Packets for 25 tests, with enough reagent for 26 tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHanna HI758-26 calcium reagent refill: individual reagent packets for 25 tests, with enough reagent for 26 tests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich Hanna meters do these calcium reagents work with?\u003c\/strong\u003e\u003cbr\u003e\nThey are made for the handheld Hanna Calcium Checker and the Marine Master HI97105 Multiparameter Photometer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many calcium tests can I run with one pack?\u003c\/strong\u003e\u003cbr\u003e\nThe pack contains individual reagent packets for 25 tests, and the supplier states it holds enough reagent for 26 tests.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these reagents meant for saltwater aquariums?\u003c\/strong\u003e\u003cbr\u003e\nYes. The HI758-26 is listed as a marine calcium reagent for testing calcium in saltwater and reef aquarium water.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use these packets with a calcium meter from another brand?\u003c\/strong\u003e\u003cbr\u003e\nThe reagents are listed only for the Hanna Calcium Checker and the Hanna Marine Master HI97105. Compatibility with other brands' meters is not stated.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this pack include a meter or cuvettes?\u003c\/strong\u003e\u003cbr\u003e\nNo. This is a reagent refill only. You will need your own Hanna Calcium Checker or HI97105 photometer to run the tests.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423763546420,"sku":"16159","price":1550.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi758-26-calcium-checker-reagents-marine-calcium-refills-25-tests.jpg?v=1743694188"},{"product_id":"hanna-hi783-magnesium-colorimeter-marine-checker","title":"Hanna HI783 Magnesium Colorimeter Marine Checker","description":"\u003ch2\u003eHanna HI783 Magnesium Colorimeter Marine Checker\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI783 Magnesium Colorimeter Marine Checker\u003c\/strong\u003e is a compact, single-parameter digital colorimeter that measures magnesium in saltwater. It is built for reef keepers, marine biology users and aquaculture operators who need consistent, accurate magnesium readings to keep a marine system healthy. Instead of matching colours by eye, you get a clear number on a digital display.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Magnesium Testing Matters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMagnesium is a crucial element in saltwater. It helps keep calcium and carbonate bioavailable to corals and other invertebrates. When magnesium drifts, your calcium and alkalinity balance can follow, so regular, accurate magnesium testing is vital for a thriving reef or marine aquarium.\u003c\/p\u003e\n\u003cp\u003eThe HI783 Magnesium Checker HC from Hanna Instruments gives you a simple, accurate and affordable way to monitor magnesium in saltwater and marine environments. Colour-coded syringes and straightforward testing steps make each measurement quick and hassle-free. The digital readout removes the guesswork of judging colour shades by eye.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for saltwater aquariums, marine biology and aquaculture applications.\u003c\/li\u003e\n\u003cli\u003eEasier to use and more accurate than conventional chemical colour-chart test kits.\u003c\/li\u003e\n\u003cli\u003eColour-coded syringes make measuring sample and reagents simple and effortless.\u003c\/li\u003e\n\u003cli\u003eDedicated to a single parameter, magnesium, for focused and reliable results.\u003c\/li\u003e\n\u003cli\u003eSimple one-button operation, so there are no complicated menus or settings.\u003c\/li\u003e\n\u003cli\u003eLarge LCD digital readout for added convenience and easy reading.\u003c\/li\u003e\n\u003cli\u003eAuto shut-off after 10 minutes of non-use helps prevent the battery from draining.\u003c\/li\u003e\n\u003cli\u003eCompact size for easy travel and storage, ideal next to the tank or in a fish-room kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse the colour-coded 1 mL and 5 mL syringes to measure the water sample and reagents accurately. The 5 mL syringes are marked with black and blue printing to keep them apart.\u003c\/li\u003e\n\u003cli\u003eCombine the sample and reagents in the sample cuvette. The reaction between magnesium and the reagents turns the sample a blue to violet tint.\u003c\/li\u003e\n\u003cli\u003eMake sure the prepared cuvette (sample plus reagents) is between 18 and 28 °C (64 and 82 °F) before taking a reading.\u003c\/li\u003e\n\u003cli\u003eOperate the meter with its single button and read the magnesium result directly in ppm on the LCD.\u003c\/li\u003e\n\u003cli\u003eFollow the supplied instruction manual and quick reference guide for the full step-by-step procedure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReef and marine aquariums keeping corals and other invertebrates.\u003c\/li\u003e\n\u003cli\u003eMarine biology work and educational settings.\u003c\/li\u003e\n\u003cli\u003eAquaculture applications that require magnesium monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCalcium levels below 300 ppm or above 500 ppm interfere with the test. Readings are therefore intended for water with calcium between 300 and 500 ppm.\u003c\/li\u003e\n\u003cli\u003eReplacement reagent set: HI783-25 (25 tests).\u003c\/li\u003e\n\u003cli\u003eCalibration set: HI783-11.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRange: 1,000 to 1,800 ppm magnesium\u003c\/li\u003e\n\u003cli\u003eResolution: 5 ppm\u003c\/li\u003e\n\u003cli\u003ePrecision: ±5% of reading at 25 °C (77 °F)\u003c\/li\u003e\n\u003cli\u003eLight source: LED at 610 nm\u003c\/li\u003e\n\u003cli\u003eLight detector: silicon photocell\u003c\/li\u003e\n\u003cli\u003eMethod: adaptation of the colorimetric EDTA method using calmagite indicator. The magnesium–reagent reaction produces a blue to violet tint.\u003c\/li\u003e\n\u003cli\u003eInterferences: calcium below 300 ppm and above 500 ppm\u003c\/li\u003e\n\u003cli\u003eOperating environment: 0 to 50 °C (32 to 122 °F), max 95% RH non-condensing\u003c\/li\u003e\n\u003cli\u003ePrepared sample cuvette temperature: 18 to 28 °C (64 to 82 °F)\u003c\/li\u003e\n\u003cli\u003eBattery type: 1 x 1.5V AAA\u003c\/li\u003e\n\u003cli\u003eAuto-off: after 10 minutes of non-use\u003c\/li\u003e\n\u003cli\u003eDimensions: 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5\")\u003c\/li\u003e\n\u003cli\u003eWeight: 64 g (2.3 oz)\u003c\/li\u003e\n\u003cli\u003eReagent set: HI783-25 (25 tests)\u003c\/li\u003e\n\u003cli\u003eCalibration set: HI783-11\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x HI783 Marine Magnesium Checker HC\u003c\/li\u003e\n\u003cli\u003e1 x carrying case\u003c\/li\u003e\n\u003cli\u003e1 x sample cuvette with 2 x caps\u003c\/li\u003e\n\u003cli\u003e1 x Marine Magnesium Starter Kit (reagents for 25 tests)\u003c\/li\u003e\n\u003cli\u003e1 x 1 mL graduated syringe and tip\u003c\/li\u003e\n\u003cli\u003e1 x 5 mL syringe and tip with black printing\u003c\/li\u003e\n\u003cli\u003e1 x 5 mL syringe and tip with blue printing\u003c\/li\u003e\n\u003cli\u003e1 x 1.5V AAA alkaline battery\u003c\/li\u003e\n\u003cli\u003e1 x instruction manual\u003c\/li\u003e\n\u003cli\u003e1 x quick reference guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTerms of Sale\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePlease take the time to understand this test kit thoroughly and familiarise yourself with it before purchasing. Because of the unique nature of this product, returns cannot be accepted.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat magnesium range does the Hanna HI783 measure?\u003c\/strong\u003e\u003cbr\u003e\nIt reads from 1,000 to 1,800 ppm magnesium with a resolution of 5 ppm and a precision of ±5% of reading at 25 °C (77 °F).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMy fish room gets hot in a South African summer. Will that affect my readings?\u003c\/strong\u003e\u003cbr\u003e\nThe meter operates between 0 and 50 °C (32 and 122 °F). However, the prepared sample cuvette must be between 18 and 28 °C (64 and 82 °F) when you take the reading. On hot days, let the sample settle within that range before testing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes my calcium level affect the magnesium result?\u003c\/strong\u003e\u003cbr\u003e\nYes. Calcium below 300 ppm or above 500 ppm interferes with the test. Check that your calcium falls between 300 and 500 ppm for dependable magnesium readings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow many tests do I get, and what do I need for refills?\u003c\/strong\u003e\u003cbr\u003e\nThe included Marine Magnesium Starter Kit contains reagents for 25 tests. The replacement reagent set is HI783-25 (25 tests), and the calibration set is HI783-11.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat battery does it use, and will it go flat if I forget to switch it off?\u003c\/strong\u003e\u003cbr\u003e\nIt runs on one 1.5V AAA battery, and an alkaline AAA is included. Auto-off switches the meter off after 10 minutes of non-use to help preserve battery life.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I return the checker if it isn't what I expected?\u003c\/strong\u003e\u003cbr\u003e\nNo. Due to the unique nature of this test kit, returns are not accepted. Please review the specifications and included items carefully before ordering.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423778816308,"sku":"16160","price":3625.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi783-magnesium-colorimeter-marine-checker-aquarium-testing-tool.jpg?v=1743694186"},{"product_id":"hanna-hi783-25-marine-magnesium-reagents","title":"Hanna HI783-25 Marine Magnesium Reagents","description":"\u003ch2\u003eHanna HI783-25 Marine Magnesium Reagents\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI783-25 Marine Magnesium Reagents\u003c\/strong\u003e are pre-made replacement reagents for 25 magnesium tests with the HI783 Marine Magnesium Checker HC by Hanna Instruments. They are made for reef and marine aquarium keepers who already use the HI783 Checker and want a reliable supply of reagent for regular magnesium monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePre-made, so the reagents are ready to use with the HI783 Checker.\u003c\/li\u003e\n\u003cli\u003eMade with high-purity chemicals to support consistent, dependable readings.\u003c\/li\u003e\n\u003cli\u003eProduced in Hanna's state-of-the-art manufacturing facilities.\u003c\/li\u003e\n\u003cli\u003eEach unit is clearly marked with a lot number and expiry date for traceability and quality assurance.\u003c\/li\u003e\n\u003cli\u003eSupplies enough reagent for 25 tests, enough for routine magnesium checks on a marine system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSaltwater and reef aquarium hobbyists across South Africa who track magnesium as part of their water-testing routine.\u003c\/li\u003e\n\u003cli\u003eMarine aquarists who own the Hanna HI783 Marine Magnesium Checker HC and need to restock reagents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese reagents are made for the HI783 Marine Magnesium Checker HC by Hanna Instruments. If you use a different meter or test kit, check that it is the HI783 model before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Hanna\u003c\/li\u003e\n\u003cli\u003eModel: HI783-25\u003c\/li\u003e\n\u003cli\u003eParameter: Marine magnesium\u003c\/li\u003e\n\u003cli\u003eNumber of tests: 25\u003c\/li\u003e\n\u003cli\u003eCompatible meter: HI783 Marine Magnesium Checker HC\u003c\/li\u003e\n\u003cli\u003eReagent type: Pre-made, prepared with high-purity chemicals\u003c\/li\u003e\n\u003cli\u003eTraceability: Lot number and expiry date marked on each unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHanna HI783 marine magnesium reagents for 25 tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these reagents work with any magnesium test kit?\u003c\/strong\u003e\u003cbr\u003eNo. The HI783-25 reagents are made for the Hanna HI783 Marine Magnesium Checker HC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many tests do I get from the HI783-25 reagents?\u003c\/strong\u003e\u003cbr\u003eEnough reagent to perform 25 magnesium tests with the HI783 Checker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to mix or prepare the reagents myself?\u003c\/strong\u003e\u003cbr\u003eNo. The reagents come pre-made for use with the HI783 Checker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow can I tell if my reagents are still within date?\u003c\/strong\u003e\u003cbr\u003eEach unit is clearly marked with an expiry date and a lot number, so you can check freshness before testing and trace the batch if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these reagents suitable for freshwater aquariums?\u003c\/strong\u003e\u003cbr\u003eThese are marine magnesium reagents, intended for testing saltwater and reef aquariums with the HI783 Marine Magnesium Checker HC.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":47423802802484,"sku":"16161","price":1045.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/products\/hanna-hi783-25-marine-magnesium-reagents-high-quality-testing-supplies.jpg?v=1743694183"},{"product_id":"hanna-hi782-nitrate-high-range-colorimeter-marine-water","title":"Hanna HI782 Nitrate High Range Colorimeter Marine Water","description":"\u003ch2\u003eHanna HI782 Nitrate High Range Colorimeter Marine Water\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHanna HI782 Nitrate High Range Colorimeter Marine Water\u003c\/strong\u003e is a handheld digital nitrate tester for measuring nitrate concentration in saltwater aquariums and other marine applications. Known as the HI782 Nitrate Checker HC from Hanna Instruments, it uses the zinc reduction method and shows the result on a digital display, so you don't have to judge colours by eye. It suits reef keepers, fish-only marine hobbyists and anyone in marine biology who needs dependable high-range nitrate readings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Nitrate Testing Matters in Marine Aquariums\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNitrate is a by-product of the nitrogen cycle, so it builds up steadily in every closed saltwater system. Too much nitrate in reef and fish-only aquariums can encourage algae, dinoflagellates and other unwanted organisms. These can quickly choke filtration, block lighting and smother sessile organisms such as corals.\u003c\/p\u003e\n\u003cp\u003eThe HI782 reads from 0.0 to 75.0 ppm, which makes it well suited to the higher nitrate levels often found in saltwater tanks. Regular checks give you real numbers to guide water changes, feeding and nutrient control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned to accurately measure nitrate levels in aquariums and marine biology applications\u003c\/li\u003e\n\u003cli\u003eHigh measuring range of 0.0 to 75.0 ppm, suited to the elevated nitrate levels common in saltwater aquariums\u003c\/li\u003e\n\u003cli\u003eDigital readout removes the guesswork of matching colours by eye\u003c\/li\u003e\n\u003cli\u003eNeeds only 1 reagent, which keeps testing simple\u003c\/li\u003e\n\u003cli\u003eNo filtration step is needed during testing\u003c\/li\u003e\n\u003cli\u003eEasier to use and more accurate than chemical test kits, according to the manufacturer\u003c\/li\u003e\n\u003cli\u003eDedicated to a single parameter, nitrate, for focused and repeatable testing\u003c\/li\u003e\n\u003cli\u003eSimple one-button operation\u003c\/li\u003e\n\u003cli\u003eLarge LCD digital display for clear, convenient reading\u003c\/li\u003e\n\u003cli\u003eAutomatic shut-off after 10 minutes of non-use so the battery isn't drained\u003c\/li\u003e\n\u003cli\u003eCompact size for easy travel and storage\u003c\/li\u003e\n\u003cli\u003eA simple, accurate and cost-effective way to monitor nitrate in your saltwater aquarium\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTake a sample of aquarium water using the supplied 3 mL Pasteur pipette and the sample cuvette.\u003c\/li\u003e\n\u003cli\u003eAdd the single reagent from the Marine Nitrate High Range Starter Kit. No filtration step is required.\u003c\/li\u003e\n\u003cli\u003eThe reagent reacts with nitrate in the sample using the zinc reduction method and turns the sample pink.\u003c\/li\u003e\n\u003cli\u003eThe Checker measures this colour change with its LED light source and silicon photocell, then displays the nitrate concentration in ppm on the LCD.\u003c\/li\u003e\n\u003cli\u003eOperation uses a single button. Follow the included instruction manual for the full step-by-step procedure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable For\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReef aquariums\u003c\/li\u003e\n\u003cli\u003eFish-only marine aquariums\u003c\/li\u003e\n\u003cli\u003eMarine biology and other saltwater testing applications\u003c\/li\u003e\n\u003cli\u003eHobbyists who want a digital alternative to colour-chart chemical test kits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe HI782 is designed for marine (saltwater) use. Nitrite is listed as an interference, so high nitrite levels in the sample may affect the nitrate reading.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRange: 0.0 to 75.0 ppm (as NO3-)\u003c\/li\u003e\n\u003cli\u003eResolution: 0.1 ppm\u003c\/li\u003e\n\u003cli\u003ePrecision: ±2 ppm ±5% of reading at 25°C (77°F)\u003c\/li\u003e\n\u003cli\u003eLight source: LED at 525 nm\u003c\/li\u003e\n\u003cli\u003eLight detector: Silicon photocell\u003c\/li\u003e\n\u003cli\u003eMethod: Zinc reduction method; the reaction between nitrate and the reagent turns the sample pink\u003c\/li\u003e\n\u003cli\u003eInterferences: Nitrite\u003c\/li\u003e\n\u003cli\u003eOperating environment: 0 to 50°C (32 to 122°F); max 95% RH, non-condensing\u003c\/li\u003e\n\u003cli\u003eBattery type: (1) 1.5V AAA\u003c\/li\u003e\n\u003cli\u003eAuto-off: After 10 minutes of non-use\u003c\/li\u003e\n\u003cli\u003eDimensions: 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5\")\u003c\/li\u003e\n\u003cli\u003eWeight: 64 g (2.3 oz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x HI782 Checker HC\u003c\/li\u003e\n\u003cli\u003e1x Sample cuvette and 2x caps\u003c\/li\u003e\n\u003cli\u003e1x Marine Nitrate High Range Starter Kit (reagents for 10 tests)\u003c\/li\u003e\n\u003cli\u003e1x 3 mL Pasteur pipette\u003c\/li\u003e\n\u003cli\u003e1x 1.5V AAA alkaline battery\u003c\/li\u003e\n\u003cli\u003e1x Instruction manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat nitrate range does the Hanna HI782 measure?\u003c\/strong\u003e\u003cbr\u003e\nIt measures from 0.0 to 75.0 ppm (as NO3-) at a resolution of 0.1 ppm. That makes it well suited to the higher nitrate levels often found in saltwater aquariums.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the HI782 in a freshwater aquarium?\u003c\/strong\u003e\u003cbr\u003e\nThe HI782 is designed for marine applications and saltwater aquariums. Its reagent is part of a marine nitrate high range kit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many tests does the included reagent cover?\u003c\/strong\u003e\u003cbr\u003e\nThe Marine Nitrate High Range Starter Kit in the box contains reagents for 10 tests.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow accurate is the HI782 Nitrate Checker?\u003c\/strong\u003e\u003cbr\u003e\nPrecision is ±2 ppm ±5% of reading at 25°C (77°F). It uses an LED at 525 nm and a silicon photocell to read the colour change, rather than relying on your eye.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill high nitrite in my tank affect the result?\u003c\/strong\u003e\u003cbr\u003e\nYes, it may. Nitrite is listed as an interference for this test, so take it into account when interpreting readings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat battery does it use, and will it drain if left on?\u003c\/strong\u003e\u003cbr\u003e\nIt runs on one 1.5V AAA battery, which is included. It switches itself off after 10 minutes of non-use to save battery life.\u003c\/p\u003e","brand":"HANNA","offers":[{"title":"Default Title","offer_id":48246721970484,"sku":"17291","price":2930.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/files\/hanna-hi782-nitrate-high-range-colorimeter-marine-water-handheld.jpg?v=1743689558"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0151\/9016\/3510\/collections\/hanna-instruments-collection.png?v=1793218968","url":"https:\/\/jungleaquatics.com\/collections\/hanna-instruments.oembed","provider":"Jungle Aquatics Pet Store","version":"1.0","type":"link"}