Ive been treating a yellow tang with cupramine for 2 solid weeks and maintained a level of .5ppm as instructed. After the first week all of the spots were gone. After 14 days I put some carbon in the tank and I began deworming. Also started treating a minor mouth fungas issue. The copper has been out of the water for almost a week. Today my tang again has ICH! Or maybe its velvet. I dunno which. The are just a couple of very small white spots. The tang does not look good. Loss of coloration and lethargic. What am I dealing with here? Need some advice ASAP.