I read the thing about liver problems in this book:
http://www.amazon.com/Complete-Illus...0408888&sr=8-1

Just as a side note:
I just got a little preview of an article that will be in the Jan 2010 issue of Coral Magazine in the email: http://www.coralmagazine-us.com/content/feeding-corals
Thought it looked interesting and am looking forward to reading the whole story in Januray... ;)