Sorry to hear about the fish.
Here is my 2 cents on ich.
Ich is an incredibly confusing pathogen. There are only two treatments that are proven, through clinical trials, to cure it - copper and hypo (though the transfer method seems to work as well) - neither of which should be used in a reef tank, rather in a hospital tank. There is no proven treatment for treating an full blown reef.
The life cycle of the parasite is such that almost any action (treatment, additive, food, etc) looks like it clears up the infection. Plus, fish can develop and immunity or a partial immunity, which only helps to confuse the issue more. Because of this confusion, there are a billion treatments thrown around as working. I have seen people say that everything from ginger to changing light bulbs cures ich, but like I say, the life cycle of this parasite makes anecdotal evidence almost useless.
Read the article linked or the other articles in reefkeeping.com or advancedaquarist.com and make up your own mind.
PS - Tyler, when I did most of my reading and questioning on ich, people who did studies told me that the temp raise idea is a hold over from the treatment of the similar freshwater ich, but that it didn't help in the saltwater parasite.
