so much tension again...

daniella3d, if you dont mind I would really like to see a few pictures of your tank.
I had a hippo tang for over a year, it had ick the third day I received it. I was a little stressed out for the first couple of month since most my collection of fish consists of tangs. I tried my best to catch the little bugger, but in a 210 was nearly impossible unless I dismentle the whole rock works. So I lefted alone, just keep feeding it selcom and garlic mix and slowly but surely after 6 long month there is no sign of any ick...until the achille showd up 2 months ago. He was treated with hypo prior to entering the dt but after a week of being chased around by the powder it is packed full of ick. Now 2 month later I still feed it heavily but the ich just seem to hang around.
I agree that quarantine will stress out your fish especially with delicate ones like achilles tang but as long as they are eating and they look health, they will be able to fight off infection. I strongly believe that ick is in everyone's tank, it's just the matters of wether your tank inhabbitants are health enough to fight it off.