Oh no, I mean should I tape it on the OUTSIDE so it sticks harder to the bottom of the tank - although there would be an air circulation problem... Otherwise my setup looks exactly like the drawing - which was very helpful when I set up the tank, thank you. I'm just going to get a temp gun along with the new therm/hygro which will probably solve everything. And oh. Oh wow. I never even stopped to think that my temperature is 98 degrees. Dear lord, I feel stupid.

Thank you for the links.