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Re: CO2 question

To: Aquatic-Plants at actwin_com
Subject: Re: CO2 question
From: Paul Sears <psears at nrn1_NRCan.gc.ca>
Date: Wed, 24 Jun 1998 08:43:25 -0400 (EDT)
In-Reply-To: <199806231948.PAA16285 at acme_actwin.com> from "Aquatic Plants Digest" at Jun 23, 98 03:48:01 pm

> From: RFellows at concentric_net
> Subject: CO2 up and running and one more question
> 
> One more question, 

(snip)

> When I add the baking soda to the water it raises the pH to 7.6
> (7.2 out of the tap) so how do I get the pH down to 7.0 so I can add the
> water to the tank?  I am changing 5 gallons in a 29 gallon tank, is this
> even enough to  worry about?

	Don't worry about it.  The change of the pH in the tank will be
pretty small - the CO2 concentration will change by a factor of about 0.82,
so the pH will change by minus the log of that, or about +0.08.


-- 
Paul Sears        Ottawa, Canada

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