in the wild they have more than 20 gal. as long as there are good hides i dont see why not. a super large tank 70-100 gal came to me and my 1.5/2 year old loves it. he utilizes all of the space and explores every inch. i had to have him in a smaller tank while i was doing some work on it and for those 3 days he spent all his time in his hide when in his normal space he climbs a lot and is more active.