Ich and Snails

A little goldie that I rescued has ich. Well I kept him in my 10g for now that has snails in it. Last nite I noticed a few sugar spots so I transfered it to my empty 10g along with the filter. The reason I changed the tank is because of my snails. Even though I am treeating the fish in another tank I am worried about the snail tank.

Can snails harbor ich? What can I use to treat them?

I know the general lifecycle of ich so that link wasn't much help, but the link to snails was helpful and concerning.

According to the apple snail website, snails have a fish like gill. Unfurtunately, I couldn't find anything on the site about ich, but it gave a list of snail lethal meds. Basically, everything used to treat ich. I did find something about snails being tolerant of salt but that was in pond applications.

Does anyone have any experience with ich, snails, and/or salt?