A few hundred parts per billion 'in the water' will do it.
 The time it takes is the major difference.
 A tablespoon of 10 PPM silver in a gallon and overnight should be plenty
safe.
 Overkill never hurts.

Ode

At 09:46 AM 8/3/2005 -0500, you wrote:
>Content-Disposition: inline
>
>Perhaps someone with more time and a better facility with numbers that I
>have could convert the ppm of silver for purifying water from the last
>post (THE SILVER INSTITUTE LETTER) and state it in practical units.
>
>Thanks,
>
>Dan
>
>
>
>
>
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