Hanna HI774 Phosphate Ultra Low Range PPM Colorimeter Marine Checker

Hanna HI774 Phosphate Ultra Low Range PPM Colorimeter Marine Checker

Hanna HI774 Phosphate Ultra Low Range PPM Colorimeter Marine Checker 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.

The 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.

Phosphate 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.

Key Benefits

• Easier and more accurate than chemical test kits: You get a digital colorimeter reading instead of having to judge a colour chart by eye.
• Ultra low range resolution: It reads in 0.01 ppm steps, so you can track the small phosphate shifts that matter in SPS-dominated reefs.
• Large, easy-to-read digits: Results are clear at a glance on the display.
• Auto shut-off: The unit switches itself off to save battery life.
• Dedicated to a single parameter: It is set up only for ultra low range phosphate, so there are no menus or modes to navigate.
• Small size, big convenience: It fits in the palm of your hand and is easy to store beside the tank or in a fish-room drawer.
• Supports coral health: It helps you spot phosphate levels that can hinder calcification and encourage nuisance algae before they become a bigger problem.

How to Use

• The checker uses 10 mL glass cuvettes. Two sample cuvettes with caps are supplied.
• It is designed to work with HANNA's reagents. ULR reagent for 10 tests is included to get you started.
• Follow the supplied instructions and quick start guide for the full step-by-step testing procedure.
• Once 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.

Suitable For

• Marine aquariums and reef tanks
• Reef keepers growing SPS (small-polyp stony) corals, which are particularly sensitive to excess phosphate
• Aquarists troubleshooting nuisance algae growth in saltwater systems
• Hobbyists who want to replace chemical colour-chart phosphate kits with a digital reading

Compatibility

• Designed to work with HANNA's reagents
• Reagent refills: Hanna HI774-25
• Uses 10 mL glass cuvettes

Specifications

• Range: 0.00 to 0.90 ppm
• Resolution: 0.01 ppm
• Accuracy: ±0.02 ppm ±5% of reading
• Light source: LED @ 525 nm
• Light detector: Silicon photocell
• Method: Adaptation of Standard Method for Examination of Water and Wastewater, 20th edition, Ascorbic Acid method
• Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
• Battery type: (1) 1.5V AAA
• Auto-off: After 7 minutes of non-use and 2 minutes after reading
• Dimensions: 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5")
• Weight: 64 g (2.25 oz)

What's Included

• HI774 Checker
• 2 sample cuvettes with caps
• ULR Reagent for 10 tests
• Battery
• Instructions
• Quick start guide

Please 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.

Frequently Asked Questions

What phosphate range does the Hanna HI774 measure?
It 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.

Why should I test phosphate in my reef tank?
Excess 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.

How many tests do I get, and what refills do I need?
The 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.

What battery does it use, and does it switch off automatically?
It 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.

Will it cope with South African summer temperatures?
The 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.

Can I return the checker if I change my mind?
No. Because of the unique nature of this test kit, returns cannot be accepted, so please make sure you understand how it works before purchasing.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

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• Bob Box: Collect within 2 days of receiving your collection notification.
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