I'm sure any brand of plain calcium would be fine. I was curious, you said you were going to put a "dish" of vermiculite/perlite/peat moss on the warm side. What is that for? You really need a humid/moist hide for the Leo on the warm side. Vermiculite & perlite should not be used as a substrate for the humid hide or in the enclosure, both are highly absorbant and can cause impaction problems. Those substrates are generally only used as a medium for incubating eggs. The best substrates to use in a humid hide are spaghnum moss/spaghum pete moss, Eco-Earth/Bed-A-Beast or papertowels. If you aren't sure how to make a humid hide, there is a link on my site with instructions. The link is in my signature.

And good luck with the new Leo when you get it !!!!
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www.StoplightCityLeopardGeckos.com

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