Re: [APD] CO2 Measurement Method

[Liz Wilhite <satirica at gmail_com>]

I have never looked at the chemicals in KH test kits but strongly suspect
they are measuring a lot more than carbonate or bicarbonate ions.  If your
KH kit does measure something other than carbonate and biocarbonate ions
then the KH/CO2 /pH charts have no meaning because you are measuring
substances that are not part of the equilibrium relationship from which
those charts are derived.

Liz
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