8 oz., Approximately 30 tests, Ideal for periodic check of magnesium & calcium concentrations. Helps determine amounts needed to be added to restore to natural seawater levels.
Magnesium and calcium concentrations and the ratio between these two elements are constantly changing in marine aquariums due to assimilation into the skeletons of corals and coralline algae, and the process of precipitation. A periodic check of magnesium and calcium concentrations is necessary to determine the amounts of these elements that need to be added to the aquarium in order to restore them to natural seawater levels. Our Tropic Marin Magnesium-Calcium-Combitest consistently determines the exact concentration of each of these elements separately. Each Tropic Marin Magnesium-Calcium Combi-Test contains reagents for approximately 30 tests.