I received a 20 long tank to use for my soon-to-be-loved (well, already-loved, but soon-to-arrive) cornsnake. (Actually, I made a great trade with Savannah, and unloaded the two huge 55-gal tanks I got from Freecycle and tricked her into giving me the more manageable 20-gal. Man, and she fell for it!) The tank I got came with a UTH, but it was in the center and I want it on one end so I can establish a temperature gradient. So I unstuck it and moved it, and of course it's not sticking again. Which I kinda expected, but I figured what the heck. Sooo... Can I restick it with a hot glue gun or some other adhesive, or is that a bad idea? I'm experimenting with just laying it under the tank to see how that goes (I have a thermometer in there to see if it is still warm enough), and my other idea is to put a thin piece of cardboard under it, and glue the edges of the cardboard to the glass all around the UTH (so the UTH itself wouldn't be glued, but the cardboard would keep it pressed against the bottom of the tank). Does anybody have any experience with this? Advice? Also, when I moved the UTH, that left a small hole in the bottom of the tank open (it's the kind with a hole in the center of the glass bottom, on purpose). I don't have a plug for it, and I was thinking of how to remedy this. My idea is to cut a wine cork to fit very snugly. Does this sound OK? Any better ideas? Thanks!!