RepCal Ultrafine (fine grind) is an excellent source of calcium for all reptiles and amphibians. Scientifically formulated from 100 natural Oyster Shell phosphorousfree calcium carbonate with added Vitamin D3 to aid in the absorption of calcium. Dosage: We ask that you add RepCal Herptivite to your weekly vitamin routine. If we premixed the products, the "beadlets" of beta carotene in Herptivite may possibly be damaged during manufacturing by the calcium in RepCal. Mix with vegetables, fruits, and pastes approximately 1/2 tablespoon RepCal with 1/2 tablespoon Herptivite per pound of food. Before feeding insects: 1) Pour Repcal Calcium in a plastic bag. 2) Place insects in the bag. 3) Shake slowly until they are completely covered. No other supplementation is required. 4) Once per week use our Herptivite Multivitamin instead of Calcium