The bigger the tank the better...I stated that 18x18x24 is the MINIMUM size for one. IF you have more... YOU REALLY NEED A BIGGER TANK to have a happy frog. As Gail mentioned up top..the tank she has is IDEAL for a whites....they will use ALL the space you give them. I have a 36x36x72 and a 36x18x36. Those are tanks IDEAL for tree frogs. THEY ARE NOT CHEAP...so if you have a lucky mom you will get her to get one that size for you. ALSO please keep in mind I have LIVE plants in my tanks. I do not deal with artificial plants as i don't think its fair to the animals. GOOD LUCK i hope you end up with a LARGER tank for your beloved herp =)