I used Aqua Mira drops from 2001-2008 on the AT, PCT, and AZT no problem. Just get use to sometimes brown water(AZT Tanks) and "floates" Bayou. Support 4-day work week @ http://www.4Days.us My Hiking Journal is active @ http://www.trailjournals.com/bayou/ N.O. Tour Page @ http://www.tournola.com