Ick Problems

[tropicana]

Well I was staring at all 3 of my fish yesterday and not a spot on them, Tonight when I got home from our ranch, the Yellow Tang has white spots all over him, and even my Volitan Lionfish has some spots on his tail and his eye. They werent there yesterday which i think is kind of weird, I sit in front of the tank everyday and look at everything in it. I dont have any corals, I have a Maroon Clownfish that doesnt have any white spots though.

Tank Contents:
4 Large peices of LR
1 Yellow Tang (with Ick)
1 Volitan Lionfish (with Ick)
1 Maroon Clownfish (no ick)
6 Red/Pink Mushrooms
1 Green Mushroom
a few hermits
a few turbo snails
and a few nasarius snails

What should I do to help them get over the Ick without hurting anything? I worry about the Maroon Cf because the fiance would get pretty upset if her fish got sick. We had the Yellow tang in the tank for a few weeks with no signs of anything, we put the Lionfish and the Maroon clown in last weekend. Then today 2 of them got it.

Food everyday:
1/2 block of Emerald Delight
1/2 block of Spirulana Frozen Brine/Mysis
2 halves of a Silverside for the Lionfish
3"x3" sheet of Dried algea every 2 or 3 days

Theres enough green algea for the Tang so I think hes eating a decent diet but im not 100% sure. The Lionfish eats good and so does the Maroon clown.

I put all that info incase anyone had any questions to further help me. Now what would be the best way to go about it?

If someone wants to take my Yellow tang and Cure him and Keep him, hes about 4" long and Hes free to whoever wants him but you gotta help catch him tomorrow evening when I get home. I just want to make sure the others dont get it again once I figure out how to cure this crap.

Please help!