Reef Ground Sand 2.0 - 3.0 mm dia., 20 KG

High purity natural aragonite of fossil origin as a substrate for all marine aquariums. Due to its purity, it is very bright with high light reflectance which is a special advantage for light-hungry corals. Reef Ground is a premium alternative to natural coral sand and protects the environment. Before placing it in the aquarium, rinse the substrate well.

CaCO3 99.2%
MgCO3 0.4%
FeO3 0.035%