When I had whites tree frogs, they used every bit of high space they could. I had mine in a 36x18x36. Now there is NO CANOPY in a tank. Maybe a ZOO, but not a tank. So the bigger the better when it comes to tank size with whites tree frogs NO DOUBT. Heck even a 36x18x36 is not even sufficent when you break it down to what they do in the wild. SO... I love how you gentlemen compare tank sizes when they are inches off but in the wild they are MANY FEET higher.