where are you getting it doesn't heat air? If you put your hand in my tank the air is pretty warm and the foil helps because as the heat is going up it is reflected back down into the tank. The first 1/2 in of My substrate is even warm till you go abit further down, and there is other people also that use heat matts on the side of the tank and not just with pacman frogs. And tons of people use the foil on the top to help maintain heat and humidty, and again not just pacman frog owners. TheCryingOrc there is several ways to heat and keep humidity up in your tank and it is going to be up to you which one works best for you. Hope you get it figured out and your frog stays healthy. Oh and my probe is not exactly against the wall where the matt is either it is placed right in the middle of the warm end. So if the air isnt heating up how is it that my basement is 72f and the middle and the warm end of the tank is 82F.