yes i have been intrigued by this method i am glad you posted a site with clear instrutions on it. i was looking for this a while back but could not find it, great site.
of course it raises all kinds of quesitons about how do you know what you are really trapping in the water, if anything? the fact that there is no way to test for orme is very frustrating. but it might be worth a try. please post here if you try it and tell us what you think.