I ordered from either LLL Reptile or Underground Reptiles. The first tank i used was a 47 High. The bottom was topsoil covered wtg about 3 inches of water. That was in my greenhouse. Next i tried in my basement in a 30 High. The substrate is a mix of topsoil and ground peat (for gardening). I read that tree frogs are poor swimmers, so i reduced the water to barely over an inch. More than half of tye water surface is taken up by a cork bark island. The frogs arrived mainly as adults with a few subadults. They were very active, without bruising. Some ate crickets within a few minutes of being unpacked. None were skinny. The substrate blends i use for many other amphibians without issue.
Any insights you have would be much appreciated