http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=trout-in-the-classroom-projects#1 I coordinate a half dozen trout in the classroom projects and a Salmon in the classroom project (on that one I just provide emergency equipment - they have been doing it longer than us) We use about 50 gallon tanks, a chiller, and the usual filters, pumps, hatching baskets... What I need help with is chillers no longer working. Is it usually r-134 problems or something else? Can they be reasonably repaired ever? clearwatertutic 2010-10-16