QuestionHi. I have a large goldfish and have noticed a discolouration to its skin, almost looks like mildew that you would see on a damp wall and is mainly black. I have looked on the web and can't find anything else that looks like this. Any ideas what it could be? I do have a picture but not sure if I can upload this. All of the other fish in the pond are unaffected and the water quality is ok with no nitrites or ammonia. Thanks
AnswerA photo would help. You can e-mail one to help at fishpondinfo dot com . Goldfish change color throughout their lives so my first thought would be that it's a color change. It might also be injured areas that are healing, for example, if the fish scraped himself. I look forward to the picture.
Robyn
fishpondinfo.com