[DaveK]

Originally Posted by ChuckG

Here's one I just grabbed on a quick search:
...
That was from: Aquarium Ich: Ichthyophthirius multifilis and Cryptocaryon irritans treatment, identification, and life cycle.

I realize that you just picked up a more or less random link. However if should be pointed out that the information contained in it is "extremely questionable" for both FW and SW.

With the exception of copper sulfate in SW, I would not recommend using any of the treatments specified in that article.