My son has gone to bed heartbroken - one of his goldfish is floating at the top of the tank with cloudy eyes, looked dead to me to be honest but I thought that dead fish sink. Eyes basically colourless. Gosh itself is still golden.
they were fed yesterday and he always says good night to them so it’s happened very recently.
can anybody advise? I have obviously erred on the side of caution and said that he’s asleep but don’t know.