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Re: Calcium and Magnesium (was APD V4 #931

Hello Chuck,

"contains xxx mg of Calcium as Calcium carbonate" usually means that the
calcium is present in some other form than carbonate, but is CALCULATED
as so much calcium carbonate.

Why would you bother with health food syore pills? They are expensive
and contain extraneous materials. Why not use DOLOMITE, available in
most garden stores as "garden lime". It is calcium magnesium carbonate.



> Date: Thu, 29 Mar 2001 21:09:00 -0700
> From: "Chuck Gadd" <cgadd at cfxc_com>
> Subject: Useable source of Calcium and Magnesium?
> At the local health-food store, they have a product that contains Calcium
> Carbonate and Magnesium Oxide, and the other other ingredient is
> cellulose.    It looks to me like a good source for increasing the GH and KH
> of my water.   Is there anything I should be aware of before using it?  I know
> the calcium carbonate part is fine, and I think magnesium oxide should be
> fine, but I'm not sure.
> Also, it states that each tablet contains 250mg of Calcium as Calcium Carbonate.
> Does that mean each tablet contains 250mg of Calcium, or would it be 40% of
> 250 mg (since 40% of CaCO3 is calcium, if I added right)?
> I've already prepared a quick test solution with a crushed tablet.  The cellulose
> is messy, but a quick strain thru a papertowel removed all of it.
> - --
> Chuck Gadd
> > or via FTP to ftp.actwin.com in /pub/aquaria/aquatic-plants.