I'm bad, forgot to add, the sand was kept constantly damp, (which would take care of humidity) I had mine for about 2 years, started with 3, one escaped and turned up months later as a furry corpse, the other 2 I gave away when I went travelling, I never managed to breed them, although I did hear calling on a couple of occasions, (after simulating a dry season followed by flooding), I was never 100% on the sexes though.