Boy, I wish I found this helpful site before I purchased my ball.lol. I did a little research before I got her and it never said anything about how hard it was to heat a glass vivarium. Okay, heres the deal. I bought my ball a glass setup when I got her. Even though I spent a crapload of money on it and the stuff to go in it and it looks good, I have a few questions. I want to set her up in a tub because ive read that this is easier to maintain proper temperatures and im worried about her well being. Right now im having temperature problems(hotspot too hot or too cold because of temperature variants on the outside of the glass.) Anyone have any ideas on the best type of tub setup I could use, also the Zoomeds UTH I use says it cannot be used on plastic on the instructions, can an undertank heater even be used on a plastic tub or would it be a fire hazard, its on a thermostat so I would imagine it wouldnt be too hot if I turned it down, but I figured Ill just ask first. And last, I was wondering if any diseases could be transfered from the glass vivarium to any other reptile (not sure yet) that I decide to put in it after I move her out of her old home. Any help would be greatly appreciated, thanks