This reagent works with both the 755 & 772 Hanna checker. It may come with the tag 755-26 or 772-26, both reagents work with both checkers. The are high-quality reagents that are pre-measured, allowing for...

The HI-782-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Nitrate colorimeter, HR Checker® HC .

20 ML BAG 35 ppt calibration solution for the calibration of salinity testers

The HI-774-25 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Phosphate Ultra Low Range Checker® HC. These reagents follow the Ascorbic Acid Method in which the reaction between phosphate and reagents...

Salinity Tester - digital Salinity tester  The waterproof HI98319 salinity and temperature tester is perfect for any saltwater aquarium. A more accurate alternative to refractometers, this tester uses conductivity to determine salinity levels of natural and artificial seawater. Ideal...

HI-784-25 Marine Ammonia reagents, 25 tests, for use with the HI-784 Marine Ammonia Handheld Colorimeter Checker.  

The HI-758-26 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Marine Calcium Checker® HC. These reagents follow the Zincon Method in which the reaction causes a blue tint in the sample....

HI-783-25 Marine Magnesium reagents, 25 tests, for use with the HI-783 Marine Magnesium Handheld Colorimeter Checker.

Three simple steps to results. The Hanna Alkalinity Checker bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next,...

Hanna Checker - Phosphate ULR Colorimeter The Hanna Phosphate checker ULR is an awesome little tool that will give you accurate easy to read results.  If you have bad eyes or have a hard time with color change...

The HI-782 Marine Nitrate High Range Colorimeter is specifically designed to quickly and accurately determine high levels of nitrate for saltwater aquariums and marine applications. With a digital read out, there is no more struggling...

Each HI-784 is delivered in a case with custom insert and is supplied with: Marine Ammonia reagent starter kit (reagents for 10 tests). Please download the Safety Datasheet(s) which provide more detail on the reagents before...

Hanna Checker - Calcium Colorimeter Ideal for salt water aquariums and coral reef tanks.Designed exclusively for saltwater aquariums, the HI-758 offers a quick, easy and highly accurate method of checking Calcium. For replacement reagents for Calcium Checker®HC use code HI-758-26 for...

The HI-781-26 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Nitrate colorimeter, LR Checker® HC .

Each HI-97105C is supplied with: Sample cuvette (2 pcs.) Sample cuvette cap (2 pcs.) Marine pH reagent, 30 mL dropper (1 pc.) Marine Alkalinity reagent, 30 mL (1 pc.) Marine Calcium reagent A, 30 mL...

Each HI-783 is delivered in a case with a custom insert and is supplied with: Sample cuvette and cap (2 pcs.) Marine Magnesium reagent starter kit (reagents for 25 tests) 1 mL graduated syringe and...

The HI-98107 pHep® revolutionised the pH industry by providing non-technical personnel with a simple, inexpensive solution to accurate pH measurement. This pocket sized pH tester is used by millions of people around the world to...

The HI-764 Hanna Ultra Low Range Nitrite Checker is ideal for salt water aquariums and coral reef tanks. With its fantastic ability to measure exceptionally low levels of nitrite, the HI-764 Nitrite Checker is great...

The HI-780-25 is the replacement reagents for the HI-780 Marine pH Checker® HC. These high-quality reagents are clearly marked with the lot number and expiry date on the dropper bottle for traceability. 

pH of ocean surface water is normally 7.5.to 8.5 pH. Over the years however, acidification tendency is to decrease 0.1 to 0.2 pH units/century. Acidification is a consequence of carbon dioxide (CO₂) absorption in seawaters...