Trev, beautiful tanks and basement, you have one heck of a place to spend your free time. Quick question, how do you deal with the humidity in the back rooms? I have a 10'x4' which is build into the wall just like you have, with access to the tank and filters/sumps through a closet door. The humidity can get rather high in there, I have a dehumidifier hooked up along with an exhaust fan which sucks the air out 24/7. My wife still claims that she smells a "fish smell" although I can not and neither can anyone else who comes into the basement. If I can get her to get off my back about this mystery smell, life would be a whole lot easier. How did you deal with the humidity?