He was the only fish in the tank, there were just snails.
I had also had him 2 weeks prior, but now problem with him until now.
I think I might have to keep an eye on fish in my 40 gallon. If this keeps happening, (all my goldies before I cleaned it out) got sick wich happened after one got its tail nipped since it was to small compared to the others and he never got better
. But he was even in my 50 gallon for alittle bit since my divider actualy worked and my 50 gallon fishies are still doing really well
I hope its not something to do with the tank