Hanna Aquarium Test Kits, Checkers & Reagents

Shop Hanna aquarium test kits, digital Checkers and replacement reagents at The Tech Den. Browse marine water-testing equipment for alkalinity, phosphate, nitrate, calcium, magnesium, pH, ammonia, nitrite and copper, alongside salinity testers, calibration solutions and freshwater ammonia testing products.

Hanna Checker test kits

Alkalinity Checkers HI772 (dKH) and HI755.
Ultra Low Phosphate HI774, High Range Nitrate HI782 and Low Range Nitrate HI781.
Calcium HI758, Magnesium HI783 (new version) and Marine pH HI780.
Ammonia HI784, Marine Nitrite Ultra Low Range HI764 and Copper HI702.
Freshwater Low Range Ammonia Checker HI700.

Replacement reagents and check standards

Browse model-specific reagent packs, certified standards and calibration check sets. Match the exact HI model number on your tester with the replacement product before ordering. Low-range and high-range nitrate products, different alkalinity models and magnesium versions have separate listings; do not assume their reagents are interchangeable.

Salinity, pH and monitoring equipment

Explore the HI98319 Salinity Tester, HI96822 Digital Refractometer, HI98108 pHep+ pocket pH tester and HI981520 marine pH, salinity and temperature monitor. The range also includes salinity calibration solution and pH buffer sachets. Check each instrument's specified calibration procedure and compatible solutions.

Choose testing equipment for your aquarium

Compare intended freshwater or marine use, measured parameter, testing range and included components on each product page. Follow the manufacturer's sampling, testing and maintenance instructions. The HI97115C multiparameter photometer with starter kit is marked as special order; contact The Tech Den to confirm ordering arrangements.