So I just got off the phone with with zoo med and I was talking to a girl a named Jennifer, I called because you almost had me second guessing myself but I feel better now. So her exact words were yes that the purpose of their UTH's is to raise the ambient air temps in your tank, not just the furnishings. She explained to me that for the cage furnishings to warm up that the air has to warm up to warm the plants and furnishings. She then said the surface temp against the glass where the matt is going to be warmer then the air so to put your thermometer away from the glass not exactly right against it or you will get a false reading but I already knew that part and I know you knew that also, that's just common sense. She then said when you open your tank do you feel the heat comeing out and I said yes of course and she said well if it wasn't raising the ambient air temp you would be getting blasted by the heat when you open your tank.





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