Jasper...
Looks like you are dealing with some major issues.
Never seen Melafix touted as an ick treatment. It may have beneficial properties that will help with other problems. It is based on some kind of tree oil that will collect on surface preventing efficient gas exchange. Strong surface current may help solve this problem.
Your fish have ick because they are under major stress.
I would suggest a number of "major" back to back water changes over the next few days.
If you are going to try and treat with any other meds, get fish to a QT tank and treat there, not in main tank with lr & corals.
Wish you luck....
Get busy with those water changes. (a little garlic extract in food may help)
Scott
