It is frowned upon on here to use anything other than a rubbermaid/sterlite tub or rack system to house your bp. I had my first ball in a 65 gallon tank for about a year and a half I never had a single problem with temps or humidity. Its a possibility that I was just lucky but it worked for me until I got 16 more snakes and now have to use a rack. I say use the larger tank if you wish but just keep an eye on temps and humidity and enjoy. Now if you plan on getting more snakes (which you will eventually lol) THen keep in mind that tanks take up alot of space.