Ode Coyote wrote:


I made a quart batch that metered at 79uS when done, dropped to and stayed at around 40 uS for about 4 years on the sill.
 I have no idea what the PPM was...probably over 100.
 Crystal clear in the shade, looked like dilute milk in the sunshine.

Well, I don't see how it could have been silver oxide and silver hydroxide, both have a solubility limit of around 13 ppm, for a total maximum for both of around 26 ppm. Maybe there was some silver nitrate (was the water exposed to air during a smoggy or stormy day), or silver carbonate, from absorbed carbon dioxide? How long was it open to the air while brewing. There is effectively no limit to the ppm of silver carbonate generation if brewed very very long with exposure to air, since the carbon dioxide absorbed by the water becomes silver carbonate, allowing more carbon dioxide to be absorbed. Were you brewing inside while cooking with a gas or wood stove, or heating with wood or an unvented gas heater. All those can increase the carbonate formation tremendously.

Marshall


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