I recently got rid of my sump so I've had to move my heater into my aquarium. I know clown loaches like to wedge themselves behind things, so has anyone had a problem with heater burn?
If you're concerned with heater burn, why not get an external inline heater. It connects to the outlet line of your filter, if you have one. I like using an inline heater, to prevent heater burns, PLUS it is one less ugly equipment in the tank.