Hi all, I have been contemplating the best way to cool my 100 gallon Rubbermaid plastic water trough down to 50ish degrees F on a fairly regular basis. I keep it in my garage and use it as a cold tub for health and performance reasons.
I need it to be affordable and as convenient as possible.
-I was thinking of maybe an industrial ice maker but theses are $800 and up used on craigslist.
-Maybe tarp off the tub and have a portable AC unit blow directly into the tub area.. AC units are still $250 or more and and it seems a cluttered setup.
-Buy a chest freezer off craigslist and find a material with high specific heat & conductivity?
-I read elsewhere that no common metal or material is going to compare with the heat capacity of using water, especially including the extra BTU absorbed when going through phase change..???
-Fill lots of small plastic bottles with water, add salt and cool them in a chest freezer?
-This iCool sport thing is cool (pun intended) but it costs $2000. advertising link removed
Other better ideas or ways to improve any of the above?