White cotton candy like infection on angel fish

WilliamG

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Joined
Sep 17, 2025
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Capital Region NY
I have an angel fish with what I would describe as cotton candy like, or spider web like growth. It seems to have spread to another angel, but only appears on the lower jaw of the mouth of that one. I am trying to figure out what it is. Searches have me bouncing back and for th between a bacterial infection and a Columnaris infection. I have also been looking into the possibility of it being cotton mouth.
I have a community 75 gal tank, well planted and 3 months old.
I am trying to figure out what to treat this with.
 

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