Yellow tang with red spot/hue

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Not sure if it has anything to do with too much water flow, my yellow tang has been a lot less active ever since I added a maxspect gyre to my 90gl thre week ago.

Today, a dark red spot appears on on side, some red hue appears on the other side near gill. Not really eating :-(

Should I take some immediate action? I for sure can lower down the water flow immediately. Or should I move it to a QT?

See attached picture, any question or advise are highly apprecited.



Staff member
Kind of looks like an injury. The fish is kind of thin. Make sure it is getting plenty of high quality herbivores food including sheets of dried seaweed.