When I saw calcium salts in an apparatus listing for a Pocket Survival Kit last year, I was working on an improvement piece of content that had been written by an experienced Vietnam physician. His reaction caught my attention. Guy, that stuff is outdated. as if to ask,” Why on earth did you get that?”
On Survivopedia, the article Potassium Permanganate: Why I Always Carry This” Old School” Chemistry very appeared.
Original source: https://www.survivopedia.com/potassium-permanganate-why-i-still-carry-this-old-school-chemical/