DAB, I'm sorry to hear about your fishes. Here's a couple of things that you can do...
1. It's impossible to setup a q tank right away. So if you have a friend who has a q tank, you might want to transfer your fish over there. While doing that, setup your own q tank. You don't need anything big, a 20 gallon will be ok. Go to walmart or kmart, whichever one. They will have a deal for a complete tank setup (heater, lights, and tank). All you need is add a filter to it. CYCLE IT COMPLETELY BEFORE YOU PUT ANY FISH IN THERE. No need for gravel or rocks.
2. The best way to treat ich is hyposalinity. I know I'm not the best person to explain this but bare with me. Do a search on hyposalinity on this site, you'll find plenty. Or if not, here's my best understanding of it. You cannot do hypo in your main tank, because it will kill your inverts, and probably the stuff in your lr. You basically lower your salinity level to about 1.009 sg, VERY SLOWLY. You need a very good salinity tester for this. That's basically it. The parasite will die because of the low salinity. I heard that you can do hypo in simply an UNUSED bucket with heater, and pump or some sort, I don't recommend it though. That's basically it. Keep in mind, with the low salinity the fish will eat like crazy, that's normal.
3. I'm sorry but garlic and cleaner shrimp won't be able to help you much since the ich has gone bad. You have three fishes infected. Try feeding garlic for the heck of it. Some people had success with that. Do that while you look for a better solution.
Beth, Terry, anyone else, care to help?
I hope that helps a little...
sebae_the_clown