Hey Luke..Glad your frogs love them. Mine do too. They go straight after them. They put on a great show for the visitors too...lol. That sand is fine..try not to get clumps of other stuff in it. I use an organic soil. I have also used soil from my garden..both worked fine. Just mix the sand and soil and spray it every now and again. I have also used just sand when Ive run out of soil and that also works..but its important to be more vigilant with spraying as when the hatching's hatch the sand can cave in on them if you dont. I really need to do an article on this soon. Good luck.