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Hanna Instruments Low Range Phosphate Checker Reagents - 100 Tests


Item #: HN1311

In Stock

The HI93713-01 are reagents for the colorimetric determination of phosphate. There are enough reagents for 100 tests to be used with Hanna’s compatible benchtop and portable photometers. These high quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot number and expiration date on each packet for traceability.

Details :

The HI93713-01 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements. The method is an adaptation of the ascorbic acid method in which the reaction between phosphate and the reagent causes a blue tint in the sample. The intensity of color is determined by a compatible photometer and the phosphate concentration will be displayed in mg/L (ppm). These reagents are designed to be used with samples that have an expected range of 0.00 to 2.50 mg/L (ppm) phosphate.


Quantity100 Test
MethodAdaptation of the ascorbic acid method.

For use with Hanna Instruments Low Range Phosphate Meter HI96713.

Manufacturer information

Hanna Instruments USA Aquarium Supplies
Hanna Instruments is a leading manufacturer of analytical aquarium instrumentation. They were founded in 1978 and are headquartered in Woonsocket, Rhode Island. When Hanna introduced pH Electronic Paper in 1986 it literally revolutionized the world of testing by allowing millions of people in various industries to test for pH in a simple, accurate and affordable way. Hanna employees are constantly challenging themselves to improve on existing technology and to invent new testing techniques with the common goal to simplify analytical testing. This applies not only to instrumentation, but also to sensors development, reagents and chemicals. Hanna also believes in controlling the quality of their products from inception to delivery so they manufacture everything themselves, from meters and electrodes to chemical reagents and buffer solutions.

5 Stars


Reviewed on
April 02, 2021

Yes, I would recommend this.

Good deal on a great product

Pros: Seems to be consistent and simple to use. When my corals look questionable, or the water looks questionable, it seems to bear out the truth after a test.

Cons: None.

I haven't noticed any other online aquatic stores offering the multi-pack of phosphate reagents but that doesn't mean they don't. The Phosphate checker is quick, simple, and probably as accurate (or more) than any hobby level test kit. Thanks for caring a multipack Marine Depot!!! That's a winner for me.

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Reviewed on
May 29, 2019

Yes, I would recommend this.

Low range phosphate reagents

Good product

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Reviewed on
February 04, 2018

Yes, I would recommend this.



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Reviewed on
May 06, 2017

Yes, I would recommend this.


This is the second time purchasing this product. It is the correct reagent for model HI 96713, the larger blue model.

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