I have a 3 year old male BP, Who refuses to go around his warm side unless he has just eaten. Even then he still stays on the warm side for a day, and is right back over to the cold side. I have him in a custom tank that i built. It's 48"L -24"D -24"H, with warm side reaching 80-81F, and cool side 75F. Here are some pics of the enclosure:

Full tank


Warm side


Cold side


Him on the branches wanting to know what i'm doing.


I have 3 other female BP's that live in tubs, and they all are doing excellent. I just can't find a tub to put him in where he has a hut a bowl and room to move. So what do you think may be the reason he likes the cold side?

Thanks,
Brandon