On a recent long section hike on the pct I met a young couple who said they treated their water with Nutrasilver colloidal silver drops. They said this was a great method, a mere drop treated a whole bottle of water, they never got sick from their drinking water, etc. Aquamira has worked well for me but now I'm wondering.
Have any other hikers had positive or negative experiences treating water with silver? I am leery of using supplements because they are so poorly regulated with many wild claims being made and no way of knowing what you're really buying. Also colloidal silver has gotten a bad rap over the years, including reports of people who have permanently turned blue from overuse.