I have not been able to find out if the creek is spring fed....its a few miles from a friend of mines property....but he told me the creek get pretty warm in the summer so Im gonna guess no and go without a chiller.Bridger;4115603;4115603 said:Chub are great fish for a tank. They are really easy to take care of. They came from a local stream that gets pretty hot in the summer so I don't think a chiller is necessary. Is the stream where the redspots are spring fed? If not then just an unheated tank should emulate their natural conditions pretty well. I have 4 in a 30 gallon with a logperch. They are really voracious feeders and are really fun to watch eat when you put in some feeder minnows. Good luck with the redspots.