Yeah a 60 x 60x 90 (24x24x36) would work great for tree frogs. You will want to lay the inside of the tank out to take advantage of all that vertical space with sticks and vines. Tree frogs will stay up high if given the opportunity.

And to add a bit of an over-share - Frogs in general will be out and more visible the more crowded you make the tank. In Short the frogs will feel more secure knowing there is a hiding spot near by no matter where they are in the tank. It is also a good idea to cover 3 sides of the tank leaving only the doors open. This will also help your frogs feel secure in their new home.


Paul