i have 3 fish in my reef tank 1 clown, 1 mandarin and a tang and i was looking at my tang today and noticed he has some bumps on him witch im thinking is ich anyone know what i should do about this? and will my other fish end up catching it to? ive never had a fish get ich before all parems are...

Can anyone tell me what is wrong with my Sailfin Tang? He is in a 90 gallon aquarium. The water test is fine. He has never been sick. He will eat a few bites, then stop eating. It looks like a smooth protrusion right in the middle of his body. There is no discoloration like you would see with a...