any one know what this is and how to treat it???:banghead3:


I’ve asked the mods to start you a new topic for this question. It’s an excellent question, but this thread is about 9 years old, so many people might miss your specific question. You will get some good answers! We all have or have had a QT (quarantine tank, hospital tanks) at some point.For a mature koi, what does ‘a hospital tank’ look like?
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