how to remove under tank heater?

[Areillea]

Try a blow dryer or a heat gun to soften the glue.

Or if you want to. Use some goof off on the glue. Then peel it off. You'd have to find a way to adhere it to the next tank though.

Um, I'm pretty sure this wouldn't work. The glue is exposed to the heat from the pad itself and it doesn't come off...