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Re: Calcium source

To: Aquatic-Plants at actwin_com
Subject: Re: Calcium source
From: Paul Sears <psears at nrn1_NRCan.gc.ca>
Date: Wed, 19 Nov 1997 08:46:34 -0500 (EST)
In-Reply-To: <199711190848.DAA12804 at acme_actwin.com> from "Aquatic Plants Digest" at Nov 19, 97 03:48:08 am

> From: Stephen Pushak <teban at powersonic_bc.ca>
> Subject: Calcium source
> 
> what is a good chemical source of calcium that won't increase carbonate
> hardness? CaCl? Will it affect pH?

	CaCl2 will work, and will not affect the pH.  You will end
up with pretty high Cl- concentrations, 12.6 ppm for each degree
of GH.  I don't know if that would be a problem.
> 
> do humic acids interfere with measurements of carbonate hardness? would
> it cause a positive or negative error in measurement?

	Any weak acid anion will cause a false high reading.  


-- 
Paul Sears        Ottawa, Canada

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