Achieve fast, accurate, water testing results with the Hanna HI758 Marine Calcium Checker® digital colorimeter without having to compare the measurement results to a color chart. The Hanna Marine Calcium Checker uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.
- Compact, portable design
- Built-in timer
- One-button operation
Ideal for: Saltwater Aquariums, Aquaculture, Water Quality, Environmental, Education