Saltwater Ick! What works?

COULD SOMEONE PLEASE HELP ME WITH MY PROBLEM! MY FISH ARE DYING ONE BY ONE!
I have two tanks set up for about 3 months. One is a 55 gal tank with live rock and filteration. Along with a protein skimmer and a uv light.
My other tank is a 46 gal.
I have tried Green X which was recommended to me for almost a week every other day. I have done a number of water changes.
I even dropped the sality to 1.20. I have a cleaner shrimp in each tank.
Here is what is left.
A Hippo Tang. Who is just about dead.
A Purple Tang. Which is hanging in there.
A Maroon Clown and a damsel.
My other tank has a yellow and sailfin tang.
The salfin tang has been battling the dreadful ick for about a week.
I have done a fresh water dip along with a formulin 3 dip at different times.
Since I have live rock in both of my tanks and no hospital tanks.
What should I do. I also have the shrimps along with some snails left. I have talked to many of people on this subject. Maybe someone out there can help!! I just noticed my clown in my other tank has a film over the eyes. Are they over medicated? Please Respond!
Thanks.
salwatergal
 
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