We have a goldfish who is over 10 years old and he was looking a bit poorly. We thought it might be old age. he swimming upside down or not swimming at all. However we have used this treatment and he has pecked up no end. So may be good for a few more years.

I used this on my fish and did at least 4/5 doses within the recommendation that it says and nothing seemed to happen. But my fish with swim bladder didn't die so not sure if it was this stuff.

Doesn't seem to work I'm afraid.