justanja will have u answer or josh in less then i day i bet u

This site has information on Calcium with D3 http://www.anapsid.org/dietcons.html
as does this one http://www.tortoisetrust.org/articles/dietcons.html
"Calcium with D3 when used with UVB can cause metastatic mineralisation of the soft tissues
Vitamin D3 is highly toxic and extreme caution should be exercised whenever oral supplementation is employed"
by A C Highfield
Tortoise trust

we have stopped our use of calcium w/ D3 until we can find a calcium that does not contain D3. what calciums are you guys using that do not contain D3...ours will not chew cuddle bone. thanks for the input.

I do not have a Sulcata but I do have Greeks and DTs
I use JurassiCal they have it with and without D3
I have always used without D3 as I use a UVB bulb.

i did a little research for the jurassiCal and it sounds pretty good! i think i read that they offer it w/ D3 and w/out D3. it's also phosphorous free. i think we will be trying this real soon. thanks for the help.

The hour of sunlight a day should be enough for him to synthesize plenty of his own vit D. I buy powdered calcium carbonate online through a vitamin/health store for $7/ pound. I only dust with a multi vit 1-2/week. If you give them a varied diet they will get many of their needed vit precursors