Aquarium accessories Meridian

High-quality natural substrate for reef aquariums. Helps stabilize calcium and alkalinity. Natural oolitic aragonite for tous marine, reef and tropical aquariums. Helps prevent severe pH drops. Meridian is an all-natural oolitic aragonite substrate for tous reef and marine aquariums. Meridian is a high-quality aragonite substrate for reef aquariums. Its grain size (0.25 to 0.50 mm fairly uniform) is ideally suited to reef dwellers, and its chemical composition will help stabilize calcium and alkalinity while preventing sharp drops in pH. Unlike competing "wet" products, Meridian is sold dry, so you pay only for the gravel and not for the unnecessary water.