i know that the size of the enclosure doesn't affect how big they grow thats a rule for goldfish but not for reptiles. I plan on building an enclosure that is about 8ftlx4ftwx6fth. itll be cut in half heightwise so i can have my burm on the bottom and my rtb up top. so theyll each have 3 ft of height. Ive read that you can control how big a snake gets by how much you feed it thats what i was talking about. And ill make sure it gets enough food for proper nutrition i wont starve it ill just make sure its not being powerfed or anything like that