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Re: [APD] CO2 charts and high pH

Joshua wrote:

> As part of an experimental procedure, I'll be using NaOH to raise the pH
> of aquaria above 8.5.  I'll then be measuring pH and KH of the water, and
> from that determining CO2 (using those handy charts.)

As a practical matter, CO2 is not stable in water at a pH above about 8.4.  It
reacts completely to form bicarbonate.  You don't need to worry much about the
handy charts.

Roger Miller
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Aquatic-Plants at actwin_com