Originally Posted by KaSaBiS
I use a mini fridge and a chest freezer with a temp controller. But without this, get a rubbermaid cooler and add water in it close to or lower than your desired temp (assuming the beer is warmer than the water) The water surrounding your carboy acts as a buffer with its extra thermal mass, prevents temp fluxuations.
If you really are fermenting one gallon at a time as seen in your pic, I would assume the $60 temp controller and $100 dollar fridge would probably an excessive purchase
Oh this is only a start. I plan on moving up fast. I'm either gonna get another 1 gallon so i can rack(or have 2 brews going at once). Or im going to start looking into bigger sized ones. So, I'm really considering a mini-fridge. Because I can get them used cheaper then $100.