Garlic, serious discussion

[albert_dao]

From the first article:

Garlic is another of the alternative treatments for Cryptocaryon to be touted lately. I have read of many people reporting using it "successfully" as a preventative. The difficult part in assessing these reports is whether the fish would have developed Cryptocaryon in the first place. And, when someone claims it to be a "cure," how can they definitively rule out natural, acquired immunity or even confusion over Cryptocaryon's life cycle.


This is along the lines of what I was thinking. I'm wondering how one would ethically set up an experiment to prove the merits of garlic.