I'm at my wits end. I've tried to not use my chiller because of the heat that it adds to the apartment, and I can't run AC 24x7. Fans have helped a lot but when the ambient temperature is high or humidity is high they don't help as much. I'm just trying to keep the tank temp under 84deg at this point, aiming for 81/82. Fortunately I haven't started to lose any corals - yet. I"m considering getting additional fans and pair with a dehumidifier in the living room where the tank is located. Any suggestions? What has worked for you?