New here. I moved a 55 gal tank of various fish into a 3200 gal. Pond. The water was circulated for 29 days prior with bio load established. Circulation and current are good. Fish transfer went good and no floaters. Fish were 2 18" mud cats, 2 7 year old lucky feeder gold fish, a fancy schubunkian (sp"?) gold fish and 3 koi( 21", 12"x2). All are doing ok except the schubunkian has turned into a softball. It is fully round to the point that the scales are starting to poke away from the body. He hasn't been at the feeding ring and I suspect that he has engourged on some snails and alage. All the other fish are progressing well but I am very concerned about this 6" round softball sized freakish one. Any ideas??