I heat my 30x13x12.5 bp tank with a 60 watt ceramic heat emitter and a UTH heat pad. The UTH is on a thermostat and soon the CHE will be as well. The probe for the UTH is taped directly to the heat mat on the outside of the tank, but I have seen others stick the probe between the glass and the pad. The thermostat itself is simply laying next to the tank, not necessarily mounted anywhere. My thermometers, on the other hand, are hanging on both end of the tank.
Hope this helps
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