[Myka]

Originally Posted by Madreefer

i guess you proved this article wrong. Read the notes at the bottom of it.

http://reefkeeping.com/issues/2008-09/fish/

You assume the OP has correctly identified Ich on the Mandarin. IME, Ich rarely kills fish unless the fish are in poor condition to start with, or the Ich is at a very, very high population on the animal. I don't think the Mandarin was infected with Ich.