JoeS Posted November 4, 2020 Share Posted November 4, 2020 I am new to aquariums and one of my fish have these brown/black markings. It almost looks like dirt on the fish. If anyone has advice on what it is and how to treat it, I’d appreciate it. Thank you! Link to comment Share on other sites More sharing options...
Administrators Cory Posted November 4, 2020 Administrators Share Posted November 4, 2020 Some more information like what type of fish and a picture would help a lot to figuring what’s going on. Link to comment Share on other sites More sharing options...
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