I have read the stickies on treatment of ich with hypo and I did as it said I am also using a refractometer... I have been at 1.009 since march 31 and all was well until tonight I came home to see my purple tang is again covered in spots I have maintained the water quality and constanley check to be sure the water remained at 1.009 and kept up with top off water... I read that I have to stay at 1.009 for 4 weeks but why all of a sudden does my fish have more spots?????