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These appear to be eith bacterial tufts or mucus cones on the area. Mucus cones often mixed with ich will often be on the body also and will do so if it is each 24 hours. If bacterial tufts, you want to assure optimum water quality and diet and fish should respond to treatment with ruby rally pro which will take longer but reef safe or more effectively in a separate treatment tank using seachem Neoplex with added aeration
You can use Kanaplex in lieu of. Neoplex will address bacterial and fungal together but kanaplex easily absorbed by fish treating internally and externallyIt's just right there on his face the rest of his body is clean. I know you said Neoplex but I have some kanaplex on hand would kanamycin help? He's already in a qt with a firefish rn. Thank you for your reply!
Except here I come, that’s the start of HLLE, but the fish may have other issues as well, see how the spots are almost exactly mirrored left and right? That’s a hallmark of HLLE.Thanks @vetteguy53081 ! I'm really happy you didn't say beginnings of HLLE. I was worried that's what it was.
Copper exposure is often implicated, but further testing indicates that is not a root cause. Previous exposure to dusty carbon is a known cause.Do you guys think maybe it was copper exposure? My nitrates have never got very high(40-50 tops)and he eats good(mysis and quarter sheet nori a day).

