Nature's Ocean Taiwan Coral Gravel

Taiwan Coral Gravel #15 is premium aragonite reef substrate 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, culturing live sand, and extremely high surface area filter media. Taiwan Coral Gravel size #15 features natural ocean gravel with grain size ranging from 10 to 15 mm.