Substrate Gray Coast

Natural calcite for tous marine and reef aquariums. Helps stabilize calcium and alkalinity. Rich in magnesium. Helps prevent severe pH drops. Improves marine fish color. Grey Coast is an all-natural calcite substrate for tous marine, reef and tropical aquariums. Helps prevent severe pH drops. Gray Coast is an all-natural aragonite substrate for tous marine, reef and tropical aquarium types. Its chemical composition will help stabilize calcium and alkalinity while preventing sharp pH drops. Unlike competing "wet" gravels, Gray Coast is sold dry: one bag contains 35% more gravel than a bag of wet gravel of equal weight.