So this all started with me recently bought a powder blue tang from a member here. He looks just like any powder blue tang, except that the blue color is kind of faded compared to what I see at the LFS, but I thought I got a good deal for $70 and get his color back over time. I acclimated him just like any other fish and put him in my frag tank. He was fine for a few days and then he started to show white spots on the fins. I took him out and put in a QT with medications for a few days, and during this time I realized something huge: this fish had eye sight problem. His eyes look normal, but when I drop the pellets in he kept missing them while they are in the water column, and when the pellets landed on the bottom of the tank he tries to go after them but always misses the pellets by about 1/8 of an inch or so. After 4 days in the QT tank the white spots were almost all gone, but he could barely eat anything and looked miserable. I could tell that he tried to go after the pellets for like 5 min and then gave up. He died yesterday in the QT when I got home after work. I also found that my coral beauty and 1 of my black clowns also died yesterday in my frag tank , and the other black clown has a some kind of white stuffs on his body as well, so I pulled him out and QT him last night. I'm so sad. All started with 1 new fish in the system from a member here. The pair of black clowns I have had for 3 years now and now the male is gone and the female is sick. Maybe I should not have gotten that powder blue tang in the first place. But I have always wanted a powder blue . I feel like an idiot now.