My BP is only 20 inches long and about 175g and he is in a 30 gal. I got it for free so I couldnt give it up. My little guy is doing great in his 30 gal. Like everyone else said, be sure to block out three sides, offer enough hides etc. Humidity was hard for me until I ditched my heat lamp on the cold side and switched to two UTH's. I'm also using a small dish of wet moss to keep humidity up. The other thing I did that helped was make cardboard panels covered in tin foil to place along the top. Good luck!