Okay, so assuming I use the tub, wouldn't a UTH melt it or something? lol. Just a thought. This has nothing to do with the tub itself, but how would I keep the temps from dropping too much on the cool side? It wouldn't seem right to have a 90 degree side and a 75 degree side. lol. Also, would he be eating so well if the tank's size was stressing him? I fed him today and he went for it in seconds. I am willing to put the extra effort in for cleaning the big tank, that is not a problem. A few people said I'd need several UTHs and that sounds crazy to me. If I put an identical hide over it, wouldn't he go in when he wanted to? Why heat the cool side when the room's temp is already 85?