Make your own bleach using Calcium Hypochlorite (pool shock). Calcium Hypochlorite has a long shelf life and one pound will make gallons of bleach.
Better than Bleach: Use Calcium Hypochlorite to Disinfect Water.
http://survivaltopics.com/better-than-bleach-use-calcium-hypochlorite-to-disinfect-water/
Preppers’ PING!!
Thanks Karto, but one question. A while ago I bought some at Walmart that is 48%, and at the time I was very careful to buy what I thought was the right concentration and that it didn’t have any other cute chemicals in it. Now I see 78% as the minimum. I plan to keep it still as my backup for chemical purification, in case my brand new bottle of bleach gets too old. Any thoughts?
I have had a problem finding the right kind of Calcium Hypochlorite