Brian,
When my unit in the 82nd Airborne went to Panama for Jungle Warfare School, we had a kid, about 21, 6', maybe about 195......they thought that sometime out in the bush, he had drank some unpurified water. The last we heard of him, after we got back, he was in Womack Army Hospital at Fort Bragg, and his weight had dropped to 130+......he looked like the walking dead! I may be a Newbie, but I learned a lesson there.....Do Not Take Shortcuts when it comes to your drinking water!......Krell