emysemys said:No, I wouldn't use that. Sponge rock is also called perlite. It is good for holding water, but because of its color, it might be taken as something to nibble on. Here's a list of things I will use:
cypress mulch
orchid bark (not mixed with anything)
clean potting soil with no additives
dirt dug from the back yard from a spot not recently dug in
Bed-A-Beast
coconut bark
squamata said:thanks for the reply just so you know if you search orchid bark on home depot what comes up is a mixture in 8qt size i went too check it out because in a previous thread someone posted a link too this product and was told it was ok homedepot is tricky the will show you what they want you too buy they do sell plain orchid bark in 4qt size its next too the mixture but no listing on their site thanks again john