Very pure natural aragonite of fossil origin as a substrate for all marine aquariums. Thanks to its purity, it has high brightness with high light reflection, which is a special feature for corals that need light. "Reef Ground" is an excellent alternative to natural coral sands and protects the environment. Before placing it in the aquarium, the substrate should be washed well.

CaCO3 99.2%
MgCO3 0.4%
FeO3 0.035%