Yellow Tang with Brown Spots

Hello All,

This tang was original to this tank which was purchased used 5 months ago. The tank was 3 years d at that time.

Lights have been upgraded and some corals added.

He has seemed healthy and happy all along but noticed yesterday some brown spots showing up.

We were told by the person who moved the tank the tang had obviously survived fin rot. The fins were like that when it arrived.

The fish is acting healthy, eating and swimming around as usual.

Is he sick?

 

If he's eating and acting normal, he's probably not sick. As for the spots, can you post a better pic? Can't really see anything in this one.

 

Thank you for your response. I can try for a better photo but alas he doesn't cooperate - he's always moving.