cheap and EFFECTIVE DIY water chiller | Rollitup
Now the coils just sit in the Rez, the cooler (or any container) just has water, the cooling element and a small pump. You only need 5-10 gallons of water in the container. This system is extremely effective and will quickly make your Rez too cold!!! I can drop 50 gallons at 75 to 65 in about 45 minutes.