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Re: [APD] Interesting idea
This [CO2=3*KH*10exp(7-pH)] is the formula that George Booth originally offered and, iirc, Karla Booth came up with it.
The one I showed [CO2 ppm = 15.696*KH*10^(6.33-pH) for 31 degrees C]
comes closer to Roger's.
----- Original Message ----
From: Vaughn Hopkins <hoppycalif at yahoo_com>
To: stuart at stuarthalliday_com; aquatic plants digest <aquatic-plants at actwin_com>
Sent: Tuesday, October 17, 2006 7:17:42 PM
Subject: Re: [APD] Interesting idea
The equation is: ppm of CO2=3*KH*10exp(7-pH). A spreadsheet almost
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