ReeFlowers Pearl White Sand is a natural, pure white sand specifically produced for aquariums. It containing 99% calcium carbonate, has no synthetic components, heavy metal or toxic substances, and is not chemically treated. Pearl white sand acts as a natural buffer to water hardness due to its calcium and carbonate content that creates a natural environment for aquarium inhabitants that prefer a higher pH. Pearl White Sand will stabilize your aquarium’s pH level between 8.1 – 8.4. The sand particles are smooth with no sharp angles or jagged edges, and help to create the optimum environment for nitrifying and denitrifying bacteria. It may be used in saltwater aquariums, Lake Tanganyika, Lake Malawi, Lake Victoria and other style aquariums that require high pH values. Because of Pearl White Sands composition, it has its own photo-reflectance that helps photo-sensitive creatures such as corals look more lively and healthy.