Sick Discus

Naughts

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Looks like external parasites? Do you have the general cure? What does the bottle say it treats? I suspect you would need the specific medication.
 

Colin_T

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Hole in the head disease, usually caused by hexamita or something like that.

Metronidazole should work but it's a sign the tank is not as clean as it could be. Make sure the tank gets a huge water change and gravel clean every week.
 

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