Help!!! Ick!!!

[Myanth]

I have lost a green clown goby that I knew was getting Ick - happened very quickly. I have a coral beauty that is battling it, now I have two four stripe damsels, one clown, and a dragon goby that have it bad in the last two days. I have corals in the tank so I'd like to avoid copper if possible... unless I don't have to. I just don't know enough and all the info on the net contradicts itself.

(other than to quarantine all new arrivals.... which I should have done)

I added three cleaner shrimp yesterday and the angel will not leave them alone. She is looking better but the rest are getting worse.

Is this enough.... or should I be doing more? Will the shrimp rid the system?

Could it come from a new food?

Could it have come on an anemone? or on a goby that decided that my drain looked like a fun ride on his second night?

I don't want to lose any more fish

Any help would be greatly appreciated.
Mike