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Re: True or false?

On Wed, 5 Dec 2001, Stephen Boulet wrote:
> True or false: with CO2 injection, a tank with a kH of 5 will be
> depleted of calcium hardness in a matter of days by the carbonic acid
> if no extra buffering is added, causing the pH and CO2 concentration
> to drop?

False.  Very false.

> I'd appreciate some comments on this. What do people use for buffering?

Use sodium bicarb, potassium bicarb or calcium carbonate.  Either of the
bicarbonates is easier to use then the carbonate.  If you want to use pH
to monitor CO2 levels then you can't use any buffer other than a carbonate
or bicarbonate buffer.

Roger Miller