Been working late last 2 weeks. Last week my rabbit faced fox fish died. Don't know why. Found his remains. Today my yellow tang is got bruises on his sides. Hiding. Tank is a 150. Everything has been ok on levels. Just figured if anyone had any ideas. Been doing water changes every couple of days. Can't get tang into quart. Tank. He's in the rocks. Don't want to stress him. I know I'm gonna sound lame but my fox fish was his best friend. Tank is a year old. I don't dose just use good salt keep it clean and spiffy. Tho i don't do so hot with hard corals.... I'm babbling.