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Re: CO2/KH/pH

To: Aquatic-Plants at actwin_com
Subject: Re: CO2/KH/pH
From: George Booth <booth at hpmtlgb1_lvld.hp.com>
Date: Fri, 18 Jul 1997 12:59:58 -0600
In-Reply-To: Your message of "Fri, 18 Jul 1997 03:48:08 EDT." <199707180748.DAA02134 at acme_actwin.com>

> Date: Thu, 17 Jul 1997 20:15:59 +0000 (   )
> From: "Roger S. Miller" <rgrmill at rt66_com>
> 
> The difference in conversion would account for a 22% difference in the 
> results.
> 
> Anyone else want to weigh in on this?

The formula "CO2(ppm or mg/l) = 3.0 * KH (dH) * 10^(7.0-pH)" seems to
match well with measurements made with a Tetra KH test kit (10 ml of
sample water), Lamotte narrow range pH test kit and a Lamotte CO2 test
kit.  So I vote for that one. 

George

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