I had an ich outbreak a couple of weeks ago. I lost my scopes tang, and my ocellaris clown was about to join him. I don't have a QT, and didn't want to start one because of reasons mentioned above. I did a lot of reading, wow there are a ton of opinions out there. I came across a product called Fish Keeper by Tropical Science. I don't usually try these things, but I didn't want to lose anymore fish. When it arrived my clown had very noticeable white all over, clouded eyes, and was sitting on the bottom. I added the 30ml a day and within two days he was looking better. It has been two weeks and now he is as happy as can be. Hope this helps
Here is the link to it on Amazon.
http://www.amazon.com/Tropical-Scie...F8&qid=1362587164&sr=8-1&keywords=Fish+keeper.
I doubt the ability of such chemicals, especially those that claim to be reef safe. More often than not the day or two period after adding the substance, the parasites have finished there feeding state and fallen off to reproduce more parasites. There hasn't been any evidence that I have found so far to prove that things like this actually work on cryptocaryon irritans.
