Quote Originally Posted by Erie_herps View Post
If you have the tape mounted on the bottom and the tubs are rubbing then it will damage it. However, if the tape is on the back and the tubs aren't rubbing it then it won't damage it. It would take many years of rubbing to cause damage but eventually they would need replaced and I've heard of the tape reaching dangerous levels because of this.
My tub has a wide lip all the way around (cement mixing tub). I think it's too much of a gap. Besides, I've always used and prefer belly heat for my ball python.