Fluffy, cotton-like, fungal growths that occur in patches, or an overall diry appearance to the skin? Fungus affects areas of the fish where the protective mucus coating has been damaged. Secondary fungal infection to an existine wound or site of parasitic infection, or poor water quality are the causes, it can also oringinate from White Spot. Treat the whole tank with a fungicide to cure the outbreak. Determine the cause of the problem, such as poor water conditions or injuries, and rectify it.
