Thanks for the quick replies!
Here is some history on the tank:
It is a 110 in-wall tall, about 1 1/2 years old with SPS, LPS and a few softies. I run a Sulfur De nitrifier that keeps my nitrates at zero. I run a large skimmer and phosphate reactor. I also have a 30 gallon refuge with 6" of Fiji mineral mud. For lighting, I run a 300W LED light.
Amm.0ppm
Trite.0ppm
Ph.8.2
Trate.0ppm
Phos.0ppm
Cal.420ppm
Large FISH:
Blue hippo tang (5")
Marine Betta (5")
Emperor Angelfish (5")
I have had the Emperor for about 2 months
I got him and a small Sail fin together. He looked good for about a week until he started to show signs of Ich. I removed him as well as the sail fin that got beat to hell and was covered in Ich. I placed them in a 30g tank and treated with copper. After a week, the sail fin died. I don't like treating with copper for to long and the emperor was showing no signs of Ich so I put him back in the display tank. That was when he started to look like he does now. He spends most of time swimming in one spot. He is eating good. I feed New Life Spectrum pelets dipped in extream garlic. I feed once a day.
Keep in mind, there is no way for me to get all my fish out and treat for for Ich. I have found that as long as the water stays good and the fish are happy, they can fight off the ich.
All the other fish look fine.