Bahamian Aragonite Aquarium Sand is the ideal substrate for saltwater aquariums. It is a pure Oolitic Aragonite sand collected from the crystal-clear oceans of The Bahamas. This aquarium sand has unsurpassed buffering capability and helps maintain a natural pH balance of 8.2 without the constant addition of chemicals. One kg of Oolitic Aragonite Aquarium Sand offers over 1 million sq. cm of surface area providing a huge space for housing ammonia, nitrite, and nitrate reducing bacteria.