hey guys, new to the forum..
I keep two packages of these survival tabs in my packs (30 days supply) read up on all of the info here:
http://www.survivaltabs.com/how-tabs-work.html but buy them somewhere else, can get them for around $19 a bottle on sale here:
http://www.campingsurvival.com/surtabnewcon.htmleach bottle has 180 tabs, a 15 day supply for a single person read up on the specs at the website