My tegu is getting too big for his 40 gallon. I was considering using a 300 gallon rubbermaid stock tank as a cage. I figured I could leave it outside in the summer, and bring it in for the winter. I live in Missouri so I think the weather would be good, plus it's humid here. I would have to be careful though because we've had summers where it's been 100+ degrees. (My wood deck the other day was like 150 degrees, but he wouldn't be on it so no worries). Not lately though. Has anyone done this before? If so, can you post pictures? I was thinking of using a soil/sand substrate. I don't really like using mulch admittedly. Is there anything I would need to add to the cage besides a water bowl? I figured he could make his own burrows. Thanks!