Rep-Cal phosphorous-free ultrafine 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 added vitamin D3 to aid in the absorption of calcium. We ask that you mix Rep-Cal with vitamin supplement Herptivite. If we premixed the products, the "beadlets" of beta carotene in Herptivite may possibly be damaged during manufacturing by the calcium in Rep-Cal. Mix with vegetables, fruits and pastes approximately 1/2-tablespoon Rep-Cal with 1/2-tablespoon Herptivite per-pounds of food. Thoroughly mix a 1:1 ratio of Rep-Cal and herptivite in a plastic bag. Place insects in the bag. Shake slowly until they are completely covered. No other supplementation is required. Available in 7-pounds size.