RE: [APD] pH at which CaCO3 dissolves

["Graham Broadbridge" <graham at peachy_org>]

I thought that this was discussed at length over the last week or so :-)

Maybe check the archives. 

-----Original Message-----
From: aquatic-plants-bounces+graham=peachy_org at actwin.com
[mailto:aquatic-plants-bounces+graham=peachy_org at actwin.com] On Behalf
Of Cheryl Trine
Sent: Sunday, 13 June 2004 2:25 PM
To: aquatic-plants at actwin_com
Subject: [APD] pH at which CaCO3 dissolves



At what pH does CaCO3 dissolve? pH=8.8

This is a question I have had for a while, also, because I get calcium
deposits on my heaters which I have to remove periodically to keep the
heaters working properly.
I'm not questioning the calculations, but if it dissolves at pH of 8.8,
why do I get these calcium deposit?.  My water has a pH = 8.2, and a dKH
= 19, I think that is around 300 on the other scale (ppm?),

Thanks

Cheri 

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