Re: [APD] CO2 measurement

[Barry Anderberg <apd at swoobs_org>]

My KH is listed in mg/L and is 313.

John T. Fitch wrote:
>> Date: Thu, 02 Mar 2006 17:49:04 -0600
>> From: Barry Anderberg apd at swoobs_org
>>
>> snip
>>
>> My city water report says KH is due only to bicarbonate, and that the KH
>> is 18.  AP test kit confirms this value.
>> snip
>>
>>     
>
> Are you, by any chance, confusing KH in mg/L (i.e. ppm) with KH in degrees? 
> I ask because my water department reports KH in mg/L.
>
> If your reading of 18 is actually in mg/L or ppm, then the KH in degrees is 
> only about 1.  The formula and table use KH in degrees.  If that is the 
> case, at a pH of 6.8, your CO2 would be only 2.4 ppm.
>
> John T. Fitch
> www.fitchfamily.com/aquarium.html
>
>
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>   

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