Hanna HI713 Phosphate Low Range Colorimeter Fresh and Marine Checker

Hanna HI713 Phosphate Low Range Colorimeter Fresh and Marine Checker

Hanna HI713 Phosphate Low Range Colorimeter Fresh and Marine Checker 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.

Key Benefits

• Digital accuracy instead of colour matching: Large, easy-to-read digits replace the shade comparisons used in traditional chemical test kits.
• Low-range sensitivity: 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.
• Dependable precision: Accurate to ±0.04 ppm (mg/L) ±4% of reading at 25°C.
• Bridges the gap: Sits between basic chemical test kits and sophisticated professional equipment, offering laboratory-style accuracy at an affordable level.
• Dedicated to a single parameter: The checker measures phosphate only, so there are no menus or modes to work through.
• Single-button operation: One button handles both Zero and Measure.
• Battery-saving auto shut-off: The checker switches itself off after 2 minutes of non-use and after a reading.
• Truly portable: 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.
• Recognised method: Based on an adaptation of Standard Method 4500-P E.
• Simple power: Runs on a single AAA battery.

How to Use

Testing takes three straightforward steps:

• Step 1, Zero: 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.
• Step 2, Add reagent: Add the HI713 powder reagent to the water sample in the cuvette.
• Step 3, Measure: Insert the vial back into the checker, press the button and read the phosphate result on the display.

For 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.

Suitable For

• Freshwater aquariums
• Marine and reef aquariums
• Hobbyists who find colour-change test kits difficult to read, including those with poor eyesight
• Aquarists who want more accuracy than a basic chemical kit gives, without moving up to full professional laboratory equipment

Compatibility

• Designed to work with HANNA's powder reagents
• Uses 10 mL glass cuvettes
• Replacement reagents: HI713-25 Phosphate Checker Reagent Refill (sold separately)

Specifications

• Range: 0.00 to 2.50 ppm (mg/L)
• Resolution: 0.01 ppm (mg/L)
• Precision: ±0.04 ppm (mg/L) ±4% of reading @ 25°C
• Light source: LED @ 525 nm
• Light detector: Silicon photocell
• Operating environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
• Battery type: (1) 1.5V AAA
• Auto-off: After 2 minutes of non-use and after read
• Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
• Weight: 64 g (2.25 oz)
• Method: Adaptation of Standard Method 4500-P E

What's Included

• 1x HI713 Low Range Phosphate Checker
• 6x HI713 Reagent Packets

Please 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.

Frequently Asked Questions

What phosphate range does the Hanna HI713 measure?
It 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.

Can I use the HI713 on both my reef tank and my freshwater aquarium?
Yes. The HI713 is suitable for both freshwater and marine aquariums, so one checker covers both setups.

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

Will it work in a hot South African fish room or garage?
The 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.

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

Can I return the checker if it isn't right for me?
No. Because of the unique nature of this test kit, returns cannot be accepted. Please familiarise yourself with 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.

If you prefer a faster 🚀 shipping option, we also offer The Courier Guy during checkout in the dropdown selection. Please note that this option is not free, and you must choose it to use it. Please pay careful attention to the cutoff times and delivery timeframe for these options during checkout.

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No more waiting at home or at work for your delivery. Simply choose a collection locker or pickup point and collect your order when it suits you.

Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*

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Collection timeframes:

• Bob Box: Collect within 2 days of receiving your collection notification.
• PUDO Lockers: Collect within 36 hours of receiving your collection PIN or SMS notification.

If a PUDO parcel is not collected within 36 hours, it will automatically be transferred to the nearest PUDO Kiosk or Depot at no additional cost. The parcel will then be held there for approximately 2 days before being returned.

Please ensure you collect your parcel within the applicable collection period. Uncollected parcels will be returned to the sender, and additional shipping charges may apply should the order need to be resent.