White fungus on koran

[flipper0512]

This is my last week of 12 weeks fallow. All fish are ich free after 4 week copper. Now my koran is showing a white fungus type film. No one else has it and is still eating and acting fin. Hard to see in pic but any help is appreciated

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[Darbell43]

Freshwater dip 5 to 6 minutes then see if it clears up.

 

[Darbell43]

You must raise the water temperature above that of your main tank and raise the Ph for this to work.