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- To: Aquatic-Plants at actwin_com
- Subject: Re: nutrients
- From: Paul Sears <psears at nrn1_NRCan.gc.ca>
- Date: Tue, 22 Jul 2003 09:13:21 -0400 (EDT)
- In-reply-to: <200307210840.h6L8eDNB009165@otter.actwin.com> from "Aquatic Plants Digest" at Jul 21, 2003 04:40:13 AM
> From: Thomas Barr <tcbiii at earthlink_net>
> Subject: Re:nutrients
> > Does a lower Ph still help with carbon uptake when using Excel?
> I would suppose so.
O.K., I'll bite. Why would a lower pH help with carbon uptake
when _not_ using Excel?
The CO2 concentration (and the H2CO3 concentration) do not
_depend_ on the pH. Don't forget - the pH is _set_ by the CO2 concentration
and the KH. A low pH may be achieved by raising the CO2 concentration, but
you can't get a good CO2 concentration by adding another acid to lower
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