That is a good thought putting foam on the back of my tank. I really don't think that is going to add too much overall though since that would be the only side to do it on. I think the top is the key. I also changed my setup a little with adding an air pump and having less water moment on the surface of the water. I think this will cut down allot on evaporation and also humidity. I'll add picks of my make shift tops on the tank tomorrow tonight I worked far too late. I Did look at the humidity when I was home it was at 54% and then the ac turned off for a bit and I saw it drop to 52% almost instantly so I know that sure cut it down fast and I only have one vent open a little down there. Tank was 80.8 when I checked Also so seems a little warmer. In the sump I saw allot of condensation. Another thought I had is how bad is condensation and most of all does it grow stuff that would be bad for the tank.
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