he still eats and no other signs of sickness he swims on his side a lot and tends to go round in circles the rest of the fish are fine the water is tip top good he started acting like this i think after a water change i think in time he will die cuz a long time (half a year back just about) i had anuther acting the same way i had no idear how to treat it and so i hoped it would get better with time it lived anuther munth i thort it must have hurt its self by jumping and hiting the glass but well maby that was not right cuz it looks like its the same thing