Ultra-pure natural aragonite of fossil origin as a base material for all marine aquariums. Due to its purity, it has high brightness with a strong ability to reflect light, which is a special feature for corals that need light. Reef Ground is an excellent alternative to natural coral sands and works to protect the environment. Before placing it in the aquarium, rinse the base material well.

CaCO3 99.2%
MgCO3 0.4%
FeO3 0.035%