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HI-736-25 Reagents for HI-736 ULR Marine Phosphorus Checker®HC

HI-736-25 Reagents for HI-736 ULR Marine Phosphorus Checker®HC

HANNA HI-736-25 Reagents for HI-736 Pocket Checker

HI-736-25 Reagents for HI-736 ULR Marine Phosphorus Checker®HC

25 tests
In Stock
£10.20 (exc. VAT) £12.24 (inc. VAT)

The HI-736-25 are the replacement reagents for the HI-736 Phosphorus Ultra Low Range Checker® HC. These high-quality reagents are clearly marked with the lot number and expiry date on each packet for traceability.

HI-736-25 Reagents for HI-736 ULR Marine Phosphorus Checker®HC information

Hanna's extended description

Reagents for HI-736 Phosphorus Ultra Low Range Pocket Checker

The HI-736-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Phosphorus Ultra Low Range Checker® HC. These reagents follow the Ascorbic Acid Method in which the reaction between phosphorus and reagents causes a blue tint in the sample. By simply adding the packet of HI-736-25 reagent to the sample, the reaction will take place and the HI-736 will determine the concentration from the colour that is produced. The results will be displayed in ppb of phosphorus. These reagents are designed to be used with samples that have an expected range of 0 to 200 ppb phosphorus.

Tip for an accurate measurement

It is important that the sample does not contain any debris.

Whenever the cuvette is placed into the measurement cell, it must be dry outside and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI-731318 or a lint-free cloth prior to insertion.

Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.

Do not let the reacted sample stand for too long after reagent is added, or accuracy will be lost.

After the reading, it is important to discard the sample immediately, otherwise the glass might become permanently stained.

Four steps. One click. Instant Readout.

1. ‘Zero’ the Checker®HC with your vial inside

2. Place a 10ml water sample into the vial and add your reagent

3. Place your vial into your Checker®HC

4. Press the button and read the results


Specifications list


Package Sachets
Quantity 25 tests
Method Adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, Ascorbic Acid method. The reaction between phosphorus and the reagent causes a blue tint in the sample.
Excellent delivery time

Top quality tests, very accurate. I use these for my reef tank. - by Trusted Customer

One of the best companies I have done business with. Communication and service was exemplary.

Excellent. Got a long use-by date which was very important to me - by Trusted Customer

Top quality, great service and super fast delivery.

Great product. Using for testing reef tank salt water - by Trusted Customer


. - by Leslie Thomas

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