Not sure what's happening to my blue-tangs

Bahamasteve

New Member
Good day,

I'm having an issue with some of my fish and I don't know whats happening. I started to notice some reddish blemishes on the fish, which appear to be eating the fish flesh. I started to see another fish with a minor blemish compared to the photos, and it seems to be starting from the head. The water parameters seem to be in place, and the coliform and enterococcus readings don't indicate a vast bacteria load. What can this possibly be? Any help would be appreciated.
 

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