Ich! Help!

[mikeclarke]

Hi there. I've got ich on my clowns and pj cardinals. My royal gramma has disappeared so I think he's succumb. I have a 100gal tank and can't catch the fish to put them in my 20gal qt. I've tried Microlift Herbtana and I haven't noticed improvement. It says you can have the uv or skimmer on. How long can I not have a skimmer with sps and soft corals? The skimmer will overflow with the medication in if so I guess I need to water change it until I can run it. Can I run the uv sterilizer? Is there any other reef safe treatment?

Any suggestions would be awesome. So far the coral cleaner shrimps and crabs are looking ok.