i have 5 small ones in a 10 gallon tank with about an inch and a half of water and plenty of dry ares 50/50 water (50%ocean water50%fresh water) saran wrap on 3/4 of the top of the tank to keep the humidity up intank filter and i feed them frozen bloodworms, live blackworms, market shrimp, frozen or live brine. and i have a 75 gallong tank 3/4 full with a dry habitat above driftwood and mangrove they seem to like to hang out on the driftwood