I would have said that *anything* even 5ppm will kill on contact. That is the key word 'contact.' If EIS comes into contact with pathogens it will kill it, whatever the ppm. Its just that the lower amounts means there is less of it to come into contact. dee

On 26 Sep 2009, at 12:11, zoe w wrote:

Yes Gina, anything above say 10ppm kills instantly on contact. Below that still works just takes a bit of time.

I had a problem with mold recently in my Kombucha jar. After cleaning thoroughly I soaked both the jar and the spigot in CS No more mold.




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