yellow tang turning pink

[rowdycru2]

My Yellow tang has pink streaks on him. I am wondering if there is something missing in his diet. Water quality is good and I have started putting dried seaweed in with his food. We thought it might be the anemone at first, but I don't think it is anymore. Does anyone know what could be causing this?

 

[nicetry]

This is sometimes caused by low pH. Post your reading for this. It can also be indicative of a bacterial infection.