Help Mandarin Dead This Am

[no1bubba]

one of my new mandarins was dead this morning and I just found the other covered with white salt looking stuff and my old hippo tang has dusty spots on just one side of his body. I am new to salt water and have never had this happen in the past 7 mo. Please tell me what to do. Bubba

 

[framerguy]

Look in the maladies forums for indepth info on fish diseases! Do you hve a quarantine/hospitol tank you can set up? You really need one if you don't, a 10g set up at Walmart may do the trick. It sounds like Ich.