I have had my goldfish since October of '07. This week I started to notice some very disturbing things. He does not swim much, just hangs at the very bottom of the tank. (When he does swim it is very slowly.) His fins are frayed and shredded, but there are no other fish in the tank to cause this. The tips of his fins are white, but the bases are blood red. His coloring is more dull now. He still eats, but only what comes to the bottom (he won't come to the surface for food anymore). Does anyone know what might be wrong with my fish? If so, is there anything I can do to help him?
