Trying to get my fermentation temps under control. Ended up utilizing a marine cooler inside my coat closet. First time I tested it without wort in the carboy it cooled down to 62 deg with 1 gallon jug of ice. I have a sweetwater 420 clone in it right now and I am curious to see once fermentation starts if it will get down that low. I have 2, 1 gallon jugs in it right now although the picture only shows 1.