Originally Posted by
jeep
It can take some time, even months, to recover if it recovers at all. I've read that you can possibly inject air directly into the swim bladder using a syringe. Whether this will be a permanent solution just depends on the fish. I would do some additional research on this procedure.
As an experiment, I would be tempted to add 1 or 2 cap fulls of hydrogen peroxide for every 10g every other day for a few days. I certainly wouldn't hurt anything and the extra o2 may at least relieve some stress.
I would also try adding 3TBS salt per 10g every other water change, adding back the amount of salt removed during the water changes to not go over 3TBS per 10.