Calcium deficiency is a major dietary problem of captive reptiles and amphibians. Maintaining a proper calcium-phosphorus (CA-P) ratio in the diet of 1.5:1 is believed to be just as important nutrionally as an adequate Ca intake. The problem in most cases is an improper CaP ratio, not too little Ca. Ca-P ratios of common cultured food items are shockingly poor (eg. ecrickets 0.13:1; meal worms 0.06:1; wax worms 0.08:1, and pinky mice 089:1). Using a calcium supplement that also adds phosphorus makes no sense as an adequate. Ca-P ratio can never be achieved. Bone meal contains phosphorus REP-CAL contains only 100% natural phosphorus-free oyster shell Calcium Carbonate for its calcium source.