Rep-Cal SRP00200 Phosphorous-Free Calcium Ultrafine Powder Reptile/Amphibian Supplement with Vitamin D3 Rep-Cal 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 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 lbs of food Shake Slowly Until They Are Completely Covered; No Other Supplementation Is Required Available In 3.3-Ounce Size