So I have been through YouTube, the boa forum and all over trying to get answers and an understanding to a few questions concerning Under the Tank Heating (UTH). I see in most cases people rave about pvc or anything other than glass is the way to go. No offense to those still using glass tanks but, with that said what are the thicknesses of your various enclosures and how are u applying UTH on anything over 3/8 thick. Will the heat from a mat still pennetrate is my concern or will I have to install a plexi cover inside the cage that is much thinner? Also I'm a bit concerned to know who goes without using UTH and why?