First off you need a pump that can hook up to tubing that will work outside of the tank. Drill 2 holes, one on each side of the frig, that are the same size as the tubing for the pump. Run the tubing through the frig, but leave some coiled up inside of it. Silicone around the holes in the frig to seal it. Whent the water is pumped throught the frig it will be cooled. This isnt the complete instructions, they are somewhere else on this site, but that is the overview. Hope this helps!i dont know of a chiller that small do a search guppy had a diy one that im gonna try with a small refridgerator.
