i dont know what this is...i have had this fish for a few weeks...never had a prob with tangs...i feed greens to them every day..plus all the rest of the stuff...my yellow tang is fine...and all the rest of my fish..any thoughts??/,,,should i pull him...wait a day...the only thing i have done is a water change yesterday. and added some magnesium two days ago...but just 100ppm...so not much...hummmmmmmmm.....rich
ps this pics are not the greatest but you will see what im talking about...
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