"dan-tucker" wrote in message
...
Hi Mel, thanks for your reply.

I have had the fish for 2 years and nothing new has been introduced to the
tank recently. The tank is round, 24cm in diameter and 17cm high. I
replace
the water with tap water that has been left out overnight, once every 10
to
14 days on average.



I would recommend a *much* larger "tank" and much more frequent water
changes..

Not to be too critical, but that size container is no place for goldfish.
It's a miracle they've survived as long as they have.


--
Toni sigh...
http://www.cearbhaill.com/goldfish.htm