I was doing some reading on substrate from breeders in Cali, and they mentioned peat moss and topsoil that had no perlite or similar substance in it. It's supposed to be soft, easily digestible if ingested, and naturally odor-absorbing. I'm thinking about switching my beardies over to it, as their former owners kept them on calci-sand their whole lives -- (I also read that calci-sand is bad, and more reports to that effect keep popping up).
Hope it's helpful!
-Jonny-
Hope it's helpful!
-Jonny-