You won't destroy the tank but trying to remove the adhered UTH from the glass, usually ruins the UTH. The Zoo Med UTH you showed will be fine. Herpstat is a great product. I have two Herpstat II and love them. Spyder Robotics has a 10% off sale right now through the 20th on all Herpstats so if your going to get one, I would suggest you order now as you'll save a little. Again, best of luck