Hello,
I have 2 fantail (gold?)fish, bought from a pet shop 3 years ago.
I have a Biorb 60 litre aquarium, complete with pump, filter etc.
For over a year, they've had what I can only think is Swim bladder. We've tried every swim bladder treatment on the market, following the instructions to a t. Nothing seems to work 
When one is not eating he's up at the surface upside down, it's heartbreaking. The other has learned to wedge himself in the weeds when not eating.
I feel terrible. We seem to have tried everything and have had no luck. Just watched the surface floater and he was making a massive effort to swim down and he just couldn't do it (except if food is involved), he just seems to be 'pulled' back up the top, where he turns upside down again.
There's absolutely nothing wrong with their appetite, but the surface floater does quite frequently get red looking sores on his side, usually a few days of Melafix sorts this out and they go 
Please help my fishies
Any advice very gratefully appreciated (their names are Phil and Michael by the way, and they are a much loved part of the family
)