I am on the hunt to find a way to cool 3 control buckets/systems in one shot vs 3 seperate chillers. I read here http://www.thctalk.com/cannabis-forum/showthread.php?48474-hydro-temps-through-the-summer-water-chiller that using a freezer would do the job. Has anyone here tried this? My plan is to take a freezer (upright) that I do not use anymore and position it near the control buckets of my rooms. I plan on using three separate pumps (one in each system) and having the loop run through the freezer than back to the system eliminating the need for 3 separate chillers. The only things I am having a hard time with before I tackle this is putting holes in the freezer. The freezer is the kind that cools the surrounding box itself not the shelves. So drilling through the side might hit something. Also, obviously I can't have the water freeze in the line while it is in the freezer. To solve this I might have the freezer on a timer and turn on and off a few times a day. But I wont be able to know until I test this out myself. I think I will be using a copper line while it is in the freezer for best transfer of heat/cool. Thoughts/suggestions?