one by one :(

[eli@fijireefrock.com]

Sorry to hear of what you are going through.
what is your filtration like and if you have a mix of corals you maybe experiencing chemical warfare as you just stated of started carbon.
As for the fish its unfortunate as you must restrain yourself from buying fish without the treating period and never add any new life to your tank until you resolve what you have going as this keeps stress on your inhabitants.