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Plenipotentiary-at-large
Bright white patch atop the eye ridge on a fish - may also show up as patches on head. Responds to general fungus treatments/metronidazole (disappears) but keeps coming back. What must one do to eliminate this? Do I not have enough filtration on the tank or I did I just manage to import something particularly pernicious? Already prompted me to 86 my last UG filter since it was/is the only tank with any kind of a problem - really getting weary of the whole affair.