Holy crap, how about this heat wave? Over 100F in Boston today, and thats without taking into account the insane humidity.
I was really worried about how my tank would do this summer, and this week has been quite the test. I ordered an Azoo clip on fan last week when it started getting hot, and I'm pretty sure I'd have a tank full of boiled coral right now if I hadn't. We only air condition the bedroom because our building doesn't have central AC, so the tank is left on its own.
A few things I think have helped. The fans obviously, but also starting the halide at 6pm (I do this anyway because I'm not home to enjoy the tank during the day). Also I've always run the tank at 80F, and its had a month to slowly fluctuate with the warming weather. Right now it pins at a maximum of 84F with the lights on, even though the ambient temp has been between 90F and 100F. Thats a great benefit from a lowly fan if you ask me, and decent evidence that I can probably keep the tank without a chiller.
Looking forward to moving at the end of this month so I can get back to stocking the tank. Hopefully we will get some better temps around the time of the move.