Nature's Ocean Hawaiian Puka Shell Premium Reef Substrate #10 2/15 lb

Nature's Ocean Hawaiin Puka Shell#5 15LBS Premium Reef Substrate: Ideal for reef system tank bottoms, denitrifying anaerobic beds, extremely high surface area filter media. Aragonite Benefits: Reduces Nitrates. Maintain pH. Increases Carbonate Hardness. Provide Marine Trace Elements. Pre-washed Minimum Rinse Required. 100% From The Ocean Floor. Heat Sterilized. Ideal for culturing Live sand.