I need major help pls :(

[RowSonic]

Hi guys. I am really worried about my reef tank. I will give a little bit of history of my tank so you guys have an idea whats up. My fish had ick problem in my display tank and i put them in a hospital tank. The fishes have been there for like 1 week and a half.

Without the fish the tank seemed to do well. But this morning when I turned the lights on, I noticed that my corals have been releasing slimes and my metallic brain is releasing slime the looks like fungus. My snails are also falling off the glass and dying My starfish is also releasing funguslike slime too. My crabs are all ok and my shrimps seem to be fine. All my corals and anemones are shrinking though.

For a week and a half I did not put any chemicals in my tank like buffers and calcium or whatsoever. I did not even feed the corals anything. I did feed them plankton today though.

What do you guys think? I really need help I can't imagine myself loosing my corals and inverts after spending this much