Hi, thanks for the reply. No we aren't over stocked. 4 fancy goldfish
in a 55g. Loads of room for them all.

I did a water test before the Furanse went in and everything was
'perfect'. I've been doing 2 water changes a week. 1 x 25% and 1 x
10%. I did read that the Furanse can 'mess' with the nitrification
cycle but as I only started using it on Thur it would have to be pretty
bad. I"ve been doing 50% changes since using that.

No idea what it could be. They seem to surprise me whenever I think
things are going well.

As for the eggs, they seem to have gone. If it was snails then I'm
really pleased about that :-)

cheers
Mellie