Sorry to hear about your tang . but for future reference I have a power brown & a hippo that eat like hogs I added a Naso that just never seemed to act right would hang out in one corner and really had no interest in eating the i read an article & adjusted my flow to move the top of my water more violently witch put more oxegen in my tank and now he's just fine and is a pig like the rest !! http://www.wetwebmedia.com/nasodisfaqs.htm