I am currently using a 60W infrared bulb that i use during the day in conjunction with a smaller UTH. I was thinking about removing the UTH from under the tank and adding a larger one there and then using another UTH on the back side of the tank to help add ambient air temps. Also once you stick those pads on are they then no good, meaning can i reuse the one that is on the underside as the one for the back or should i just buy some 2 new ones.