swimming upside down

Hi All

I have nine goldfish in a 4ft long tank.

All seem very healthy and happy except for one. About half an hour after i
feed this fish starts having problems swimming and keeps floating to the
the top. swims down and floats to the top again.

ater doing this for some time it then starts lying on its side and
struggling to swim before eventually losing the battle and swimming /
Floating upside down.

However when i get up in the morning the fish is swimming fine no problems
keeping depth as its condition has vanished.

yet when i feed that night it all starts again.

This has been going for the last 6 days.

I have had my tank for 8 weeks.

Any ideas

Thanks

Craka

Most likely bladder infection. Can't keep his buoyancy, can't fill it up
with air. Try for few days not to feed it.
Maybe when he rest for a while, gets better. Check for medication, I think
there are some out there.

Julius

"Paul Bahr" <bahr.phb.RemoveThis@optusnet.com.au> wrote in message
news:415e491e$0$10346$afc38c87@news.optusnet.com.au...
> Hi All
>
> I have nine goldfish in a 4ft long tank.
>
> All seem very healthy and happy except for one. About half an hour after i
> feed this fish starts having problems swimming and keeps floating to the
> the top. swims down and floats to the top again.
>
> ater doing this for some time it then starts lying on its side and
> struggling to swim before eventually losing the battle and swimming /
> Floating upside down.
>
> However when i get up in the morning the fish is swimming fine no problems
> keeping depth as its condition has vanished.
>
> yet when i feed that night it all starts again.
>
> This has been going for the last 6 days.
>
> I have had my tank for 8 weeks.
>
> Any ideas
>
> Thanks
>
> Craka
>
>