So i am sure this has already been tried, but i'll ask again as a refresher. I was pondering/brainstorming how to cool a nice sized tank without the high cost of a chiller. I remembered a small fridge I gave my wife's grandfather that cost me less than 250.00, and i know there are a ton on Craiglist for 50.00. Basically i was wondering if anyone coiled 10,15 even 20 ft of 1/4" ATO tubing inside the fridge? The more tubing inside, the colder the top off water would get. eventually one could adjust the amount of tubing until the desired temp was reached. Two tiny holes would need to be drilled for the tubing, kind of like a Keg fridge. But i would be able to keep frozen foods, medicines, vitamins, flake food and pretty much any perishables.
Now i am only thinking of ATO water, but a small power head can also circulate water through the fridge and sump via the same method?
Thoughts? crazy nonsense that will never work?