Quote Originally Posted by tgampper View Post
You may also consider this important point"

"Phosphorus is also an important component of bones and must also be included with calcium in the diet.Consequently, amphibians must have adequate calcium and phosphorus in their diet, and sufficientVitamin D3 must be supplied through the diet or by UV-B lights."

Source: UV-B, Vitamin D3, and amphibian health and behaviour Dr Robert Browne, Postdoctoral Fellow, robert.browne@gmail.com; and Dr. Francis Vercammen, Veterinary Officer,Center for Research and Conservation, Royal Zoological Society of Antwerp, Belgium.
You re absolutely right ! I'm studying vet and the calcium is integrately relationated with phosphorus. Depend on the spp, there must be a suitable proportion