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Re: CO2 causing a rise in KH
- To: Aquatic-Plants at actwin_com
- Subject: Re: CO2 causing a rise in KH
- From: Paul Sears <psears at nrn1_NRCan.gc.ca>
- Date: Mon, 22 Oct 2001 09:35:19 -0400 (EDT)
- In-Reply-To: <200110201948.f9KJm1Q06788 at actwin_com> from "Aquatic Plants Digest" at Oct 20, 2001 03:48:01 PM
> From: "Philippe Lemaire" <ph.lemaire at CompaqNet_be>
> Subject: Re: CO2 causing a rise in KH
> IMHO adding CO2 can prevent KH of going down...
> I mean some plants can take carbon from carbonates when necessary and make the KH lower.
That occurs when you have high KH and high GH. The reaction is:
Ca++ + 2HCO3- -> CaCO3(solid) + H2O + CO2
The pH will be well over 8. You won't get an already low KH being
reduced by this mechanism.
Paul Sears Ottawa, Canada