The Ich article was linked as a response to the earlier statement that ich comes from poor conditions in aquaria. Ich isn't caused by stress, but a parisite. Granted, stressed fish succumb to this disease much easier than healthy, unstressed fish.

I'd never advocate the use of any corrective measure over proper maint. and husbandry. If I've learned nothing else in 40+ years of fishkeeping, I've learned the absolute necessity of doing the work involved in keeping healthy aquaria and inhabitants.

As y'all already know, many of the fish bought are stressed to some degree. This, IMO, necessitates proper QT procedures of new acquisitions prior to introducing them to my aquaria. If a new fish has ich or some other disease, it's much easier and wiser, IMO, to treat the disease in a QT set up than in the "show" tank.

Mark