Zoo Med Laboratories - Repti Calcium With D3 8 ozUltra fine Precipitated Calcium Carbonate Supplement with 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. Safe levels of vitamin D3.8 oz - UPC: 97612134087