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 I pulled it from my display.  The QT tank has a bio filter.  I always have a bag of seachem matrix in the sump ready to go for these situations.
 I started a vibrant treatment so I wouldn't be surprised if the water quality in my display is off.  None of my other fish seem to be affected.  I've read tangs are sensitive to water quality.
 
 I don't have copper either as qt with cp.
 
 Thanks
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