The Rep-Cal phosphate free Calcium powder without D3 says that it is for reptiles raised under natural sunlight conditions. Most people on this forum say that they use this most of the time and with D3 twice a month and the multivitamin powder twice a month. I am using a Reptisun 5.0 and a 60 watt bulb in a indoors enclosure. Should I be using the phosphate free calcium powder without D3 because by the chameleon being indoors it is not in natural sunlight conditions. Should I change the supplements I use or is it alright. I have just had Muldoon for a week.