Did you try a swimbladder treatment? That would help if it's a bacterial infection of the swimbladder, though it sounds like too much damage has been done already. In the UK Interpret do a treatment for swimbladders, but I'm sure other places have something similar.
It's worth answering Wilder's other questions in relation to all your fish. If you have any bent spines, bloating or looking overly thin, it could be internal parasites. I'd keep a very close eye on them all for a bit, just incase the swim bladder issue was caused by something else. I had two get swimbladder problems after having worms.
It's worth answering Wilder's other questions in relation to all your fish. If you have any bent spines, bloating or looking overly thin, it could be internal parasites. I'd keep a very close eye on them all for a bit, just incase the swim bladder issue was caused by something else. I had two get swimbladder problems after having worms.