beer cooler?
My place doesn't go above 85 degrees too many days a year (now that I've said that, I've probably jinxed myself!)
Could I either run my reactor tubing or return tubing temporarily through a cooler filled with cans of ice cold coke, root beer, soda, beer/drink of choice, lots of ice and water? I wonder if that would get the tank (and myself) through a few of the hot summer days?