Steripen Pre Filter

Hiked from Whitney Portal and stayed at Outpost Camp. My buddy and I had a shuttle lined up and we were going to go through Miter Basin out to Crabtree but I ended up hurting my knee, so we summitted and went back to the Portal and then home. Some day!!!

And yes my photo was taken the second week of Aug. 2006. Isn't that funny!!

I'm looking for a pre-filter to use before adding Aqua Mira. These are all great ideas!