I have a shubunkin goldfish that i've had for a while now. Started out as a feeder, then a cycle fish, and is now a 10" goldfish living in a tropical tank. I know for the long term, warm water is not good for coldwater fish, so I'm trying to find him a new home. I'm curious though, after having lived in 80-85 degree temps his whole life, would suddenly going into cold water hurt him? I know he would be acclimated, but 85 to below 70 would be quite a drop.
