My Naso Tang is showing signs of Ich. There are three other fish, Koran Angel, Yellow Tang and Tomato Clown, not showing any signs. I have a several corals and two (use to one) large anenomes.
Looking for advice on the best way to treat this problem. The Naso has many small white spots on his body. He also zooms around the tank, scratting himself.
tank, 20 gallon sump
PH 8.2, NO3
Thanks in advance.