DIY Water Chiller : 17 Steps (with Pictures) - Instructables
Amazon.com: Thermoelectric Cooler Refrigeration Water Chiller DIY Water Cooling System Cooler Device Aquarium Tank Accessories for Axolotl Fish Tank 120W/180W for 30L/40L Tank (120W for 30L Tank) : Pet Supplies
Making a DIY 12000 BTU/hr Glycol Chiller - a BrewUnited blog entry