Bleach for water purif.

Something I picked up from survivaltopics.com:

Bleach loses it's effectiveness over time, so if you keep it around the house for an emergency, you need to rotate it on a regular basis. The web site recommends buying the solid form, commonly used for shocking pools, and using that. It could be something more easily carried in a PSK.
 
We always have 2 gallons for laundry. 1 being used and 1 on the shelf. Besides, for the price of water purif tabs you can buy a gallon of bleach and have enough left over for a pint of beer.

Considering bleach comes in a PET (Polyethelyne) bottle from the store, I don't think it is very reactive with plastics. I do think the bottle should not let light in. I think light breaks down the bleach.
 
cmdionne said:
I've used bleach while on a canoe trip in Algonquin park in Ontario, and it worked well for all of us involved.
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It's been years since I canoed in Canada (Fish Lake most of the way to the Ottowa. Super tough portages. We used nothing. It worked.

Not all water "in the field" has giardia or crypto. Using bleach is a way to possibly find out.

And, again, some dead un's is better than none. So if all you had was chlorine hydroxide, you'd be wise to use it, just like if all you have is a bandanna, it's better to expedient filter and settle before consuming.

A good commercial filter plus bleach should approach 100% on live hazards.

(What I don't "get" is why relatively current books from UK authors with lots of "rep" talk potassium permanganate exclusively when that chemical was superceeded by chlorine decades ago due to chlorine's grater effectiveness.)
 
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