Rep-Cal SRP00210 Phosphorous-Free Calcium Ultrafine Powder Reptile/Amphibian Supplement with Vitamin D3, 7 lb 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 7 lbs Size