Thanks for the compliments each cage hase a 40 gallon under tank heater in the hot spot covered by a piece of 1/4 inch plexi glass so the snakes aren’t directly on it . Here’s also a probe for the herpstat2 on top of the plexi so it dosnt get too hot . I just put the 12” flexwatt on the cool side because it wasn’t getting above 70 and I wanted to bring it up to 80-85. As far as covering the whole felxwat lt in the aluminum tape , I saw a video on YouTube that made me believe I wasn’t supposed to go over the edge of plastic on the sides. Here was a dotted line I basically followed ..... I but after the heat tape the ambient temp is right around 80 degrees . Thanks for the tips and good to know about the bottom tank I appreciate the help