It doesn't take much.
It seems that only a few parts per billion will sterilize water but the weaker the CS the longer it must sit.
I believe the BYU study shows 6 minutes at 3 PPM?
Off hand, a few inchs of silver, a nine volt battery or old car battery, a few minutes in a gallon of water and
I saw a report on TV about the bad water situation in Iraq with respect
to the drinking water being contaminated with bacteria and hepatitis
etc.
I was thinking that it might be possible to make CS to sterilize the
water, in a pinch, using silver and batteries which would be available
there,
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