Aragonite

Definition: Aragonite is a form of calcium carbonate.

In Aquariums: Aragonite is commonly used in aquariums as a substrate or additive to increase carbonate hardness (KH). It helps stabilize and buffer the pH level of the water, particularly in marine and reef aquariums. The presence of aragonite also benefits organisms with calcified structures, such as corals, by providing a source of calcium essential for their growth and well-being.