Nature's Ocean Coral Shelf Rock

Nature's Ocean® Coral Shelf Rock is 100% premium all natural aragonite rock that is flat on both top and bottom, with an approximate height of 3 inches, allowing for easy and stable stacking when creating a base for growing live coral or as an addition to existing coral-based ecosystems. Nature's Ocean Coral Shelf Rock is covered with naturally formed holes and crevices, giving unique character to each piece and resulting in beautiful aquascapes. Coral Shelf Rock's naturally porous characteristics provide a natural biological filter, as well as a perfect environment for nitrifying marine bacteria to grow and flourish, which effectively reduces nitrates in your tank.