Definately read the article that Spartan linked, (thanks for linking that one BTW) Also I have used the salt and heat treatment with MTS's and with pond snails, I saw no side efeects at all. Most shrimp will tolerate salt quite well, many are brackish water species that will live in freshwater anyhow. Don't cry, this hobby has frustratiing days, but you can win most battles, and the ones you lose will teach you something even if losing does Suck! ICH is IMO one of the easier battles there is, fin rot should not be difficult, but I have not treated it myself. I would do some very serious checking with other tank paramiters, ICH doesn't typically just break out for no reason, and most of the time fin rot is a secondary sign of other stresses or damage (could be ich that caused it though)
Dave
Dave