Rep-Cal SRP00220 Phosphorous-Free Calcium Powder Reptile/Amphibian Supplement without Vitamin D3, 3.3-Ounce Calcium deficiency is a major dietary problem of captive reptiles and amphibians Bone meal contains only 100-percent natural phosphorous-free oyster shell calcium carbonate for its calcium source Mix with vegetables, fruits and pastes approximately 1/2 to 1 tablespoon per-pounds of food Shake slowly until insects are completely covered Available in 3.3-ounce size