I just checked the bottom of my tank and it's fine and been for a month. I have a 29 gallon high and I'm only using a 10-20 gallon zilla UTH for his hide,since he is still a baby. Plus what I use for day time heat,which is a 100 watt bulb...no problems,with using the bathroom or shedding or eating..he hides most the time but likes to poke his head through the bushes and just look around and sit with half his body on the rock and look around...temps and humidity is good..so I have no problems so far,if anything arises then I'll change..for now,I say if it ain't broke don't fix it....