Samoa Pink Sand #0 is premium aragonite reef sand harvested from the ocean floor, pre-washed and heat treated for convenience. Its unique composition reduces nitrates, maintains pH, and increases Carbonite hardness. Ideal for reef system tank bottoms, denitrifying anaerobic beds, and extremely high surface area filter media. Samoa Pink Sand size #0 features grain size of 0.5 to 1.5 mm.