Water Testing » Calcium » Calcium Mini-Lab Test Kit by Red Sea

The Red Sea Calcium Mini Lab Aquarium Test Kit is an advanced test to accurately measure the concentration of dissolved calcium. Accurate to 20 ppm. 60 tests.

About Calcium
Corals, calcareous algae and other invertebrates use large amounts of Calcium for the building of their skeletons or shells, which mainly consist of Calcium Carbonate (CaCO3).

Calcium easily precipitates (comes out of solution) as Calcium Carbonate, especially at higher pH values. Because of this, and as a result of continuous usage by invertebrates, this element is quickly used up in the limited volume of the marine aquarium.

A high Calcium level for the reef aquarium in which so many organisms build calcareous structures is essential. A gradual decrease in the concentration of this essential element will result in growth stagnation and degeneration of invertebrates. The Calcium level of natural seawater is approximately 400 ppm.

A level of at least 400 ppm should be maintained in the aquarium, however, for optimal coral growth 450 ppm is even better.

It is recommended to measure the Calcium concentration every week.