Ultra fine Precipitated Calcium Carbonate Supplement without D3. Phosphorus-free calcium supplement for reptiles and amphibians. Has a unique shape/high surface area per gram resulting in increased calcium bioavailability. Highly bioavailable source of calcium carbonate. Free of harmful impurities (not from Oyster Shells) Safe levels of Vitamin D3; Use for additional supplementation. br/>Sold in Quantity of: 1