"Phosphorus-free calcium supplement for reptiles and amphibians. We use only Precipitated Calcium Carbonate which is white in color and essentially lead-free. Impurities from other calcium carbonate sources make the supplement appear gray. Your reptiles will receive a highly bioavailable source of calcium carbonate free of impurities. Recommended use with D3: Diurnal species that stay indoors (Barbados dragons, chameleons, terrestrial and aquatic turtles). May be offered occasionally to nocturnal animals. "
