"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 and impurity-free source of calcium carbonate. Recommended use with D3: Diurnal species that stay indoors (Bearded Dragons, Chameleons, terrestrial and aquatic turtles). May be offered occasionally to nocturnal animals. "
