Originally Posted by Jonnio
Even just a t-shirt that wicks the water up from the bath onto the carboy can do wonders to lowering temps.
To the OP: the wet tshirt trick really can help wick heat off, and you can start immediatley (nothing to freeze or maintain). I have found that a cheap walmart plast oil drain pan is just big enough for the fermenter and water reserve without taking up too much floorspace.
I'd say that the shirt wicks 5f off by itself, maybe 10f if there is a fan on in the room.
After years of fighting texas heat I finally got a spare fridge and controller which I usually set 65F-70F depending on the preferences of the yeast in question.