Fluker's calcium D3 free and phosphorus free is essential for all outdoor captive reptiles. This premium calcium supplement provides the calcium your pet needs for strong healthy bones and vital bodily functions. Fluker's calcium without vitamin D3 is preferable for reptiles and amphibians that are kept outdoors or under very intense UVB lighting. Calcium supplement without Vitamin D3 is essential for all outdoor captive reptiles Phosphorus Free 4 Ounce jar