if you stick on the heat pad and use a razor to remove the stuck heat pad it ruins the pad and it cant be used anymore. your better of taping the heat pad to the tank with duct tape or aluminum tape so that you can remove the heat pad and re-use it if need be.

heat pads should always have some sort of control device attached to them. they create a surface area hot spot that can get dangerously hot if it is not regulated.