Just so happens I am being given a free tank (possible two tanks, don't know the dimensions on the 2nd one), the dimensions are actually quite interesting.

My current enclosure is.. roughly 50 gallons, the dimensions are 25″ x 18″ x 25″, however on Thursday I am picking up a 35 gallon hexagon tank, it is 23 1/4″ x 20 3/16″ x 24 3/4″.

I plan on added a false bottom and doing spray foam backgrounds on both these tanks, so this question is probably moot. Which dimensions would be better for whites tree frogs do you guys think? Could the 35g house two frogs comfortably? I'm thinking they would be roughly equal, I guess once both tanks are complete I will decide where to put the whites, once both tanks are set up, I will probably get additional frogs.