I need to get a thermostat for one 15 gallon glass tank that I'm planning on keeping my lesser boy, Ludwig, in eventually (still in the baby rack now). I'm hoping I can get away with just one UTH to provide a nice gradient. Do those of you keeping BPs in glass tanks have any recommendations or any bad experiences with certain products to share? I don't really want to spend a lot for just one tank, but I don't want to waste my money on a piece of crap either. Thanks for any input!