Eco Complete African Cichlid Substrate is complete with minerals and contains aragonite! Eco Complete maintains the high pH that African Cichlids need, without the constant addition of chemicals. It buffers automatically for the life of the aquarium and adds calcium, magnesium, carbonate, and more! The dark colored substate encourages the richest coloration in your fish. The unique composition recreates the African Rift Lake environment. Eco Complete's high internal porosity maximizes biological capacity which keeps your fish healthier. Eco Complete Cichlid Substrate is biologically complete! It contains live, water purifying bacteria that makes cycling a new aquarium faster and safer. It also creates a natural biological balance which discourages nuisance algae. No rinsing required! Eco Complete is packed in a water conditioning solution for immediate results!