Don't know what RXP is or aa but copper will also kill your live rock.
I suggest you go to REEFS.ORG
http://reefs.org/phpBB2/index.php?si...b85e48d4adbbf9
Do a search on ICH get ready to read all day.....
The end result you need a quarantine tank. In the mean time I would soak your food in garlic gloves and feed your fish with that.
Good Luck ICH SUCKS!
dave