What's heating up my tank?

[Brad S]

Update: I've had the heater and lights disconnected for the last few days and the temp is currently 82.01 degrees. Guess that's proof positive it's the heat radiating off of the wall behind the tank. Yeah, it's been getting up to 94 outside here lately. Ugh... Well, time to make some sort of heat shield. I was thinking about putting a piece of sheet rock maybe behind the tank. Just put some slats between it and the wall and that should pretty much stop the heat I think. I could paint it any color I want or put a picture on it too. A lot of fooling around though. Anybody got a simpler idea?

Thanks in advance!