Rep-Cal SRP00100 Phosphorous-Free Calcium Fine Powder Reptile/Amphibian Supplement with Vitamin D3, 5.5-Ounce Rep-Cal fine powder is an excellent source of calcium for all reptiles and amphibians Scientifically formulated from 100-percent natural oyster shell phosphorous-free calcium carbonate with vitamin D3 to aid in absorption of calcium Mix with vegetables, fruits and pastes approximately 1/2 tablespoon Rep-Cal with 1/2 tablespoon herptivite per-pounds of food Shake slowly until they are completely covered; no other supplementation is required Available in 5.5-ounce size