My YT passed the other day. He had brown spots on them that appeared in one day. I went to work and he was dead when I got home. I am dealing with ich so is how it looks on the yellow tang?
No, ich looks like salt grains sprinkled on fish. There is a pic of ich infested fish in the FAQ Thread at the top of this forum.
Can you give some details about the "brown spots". Size, shape, etc.
There is a separate disease black ich which looks like regular ich but has brown/black spots. This would be the case if the spots were small. It often coexists with regular ich but is easier to see with light-colored fish. Watch your other fish for similar symptoms. It requires a different treatment then regular ich (usually formalin baths).
The brown spots were oval shaped and appeared very quickly. I have ich in my display tank which is ravaging my fish. Don't have quarantine so it looks like I will loose everything except my lr and inverts. Very sad but I learned that I need a quarantine tank and to be very cautious before I add anything to display.