The HI-97105 is designed to accurately determine pH, Alkalinity, Calcium, Nitrate, Nitrite, and Phosphate levels in aquariums and marine biology applications.  Alkalinity, Calcium, Nitrate, Nitrite, pH, Phosphate   The HI-97105 Marine Master Photometer combines accuracy...

Testing and monitoring salinity in saltwater aquariums is an ongoing task. The HI-981520 Marine Monitor is the ideal solution for aquarists looking to continuously monitor salinity levels in aquariums, seawater, or aquaculture.  pH  Temperature  Salinity...

The easy to use Checker plus is a real favourite with students and researchers due to its clear LCD display and long thin pH electrode. The checker offers automatic calibration and buffer recognition, calibrated buffer...

Make sure your marine tank or even a natural reef is in perfect health with the Hanna Reef Kit. This great professional kit includes: HI-772 Seawater/Marine Alkaline Checker®HC(dKh) HI-758 Marine Calcium Checker® HC HI-774 Marine...

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...