CaribSea Aragonite buffers to the highest pH and delivers more calcium, carbonate, and trace elements than any other substrate. Little or no rinsing required, aragonite keeps aquariums healthier, longer. Caribsea Aragonite Grand Bahama is the perfect substrate for African Rift Lake cichlids. It is ideal for marine and reef aquariums, creating a natural biological and mineralogical balance to discourage nuisance algae growth and improve the health of your fish. Caribsea Aragonite buffers to the highest pH making it perfect for Rift Lake cichlids. Aragonite delivers more calcium, carbonate and trace elements than any other substrate, keeping your aquarium healthier for longer. It is an aid to your biological filtration because it controls nitrite, ammonia and other wastes. It is ideal for shallow beds and reef bottom cover, ideal for Berlin systems, plenum systems and refugiums.