Re: [APD] adding Calcium Carbonate

[António Vitor <antonio_vitor at sapo.pt>]

I also have that!

A 10 KG recharge for removing humidity!

the problems is that Cl- ion

If we have some Na+, then it's like injecting a little salt on our water...

----- Original Message ----- 
From: "Graham Broadbridge" <graham at peachy_org>
To: "aquatic plants digest" <aquatic-plants at actwin_com>
Sent: Friday, June 11, 2004 12:22 AM
Subject: RE: [APD] adding Calcium Carbonate


> 
> I simply use calcium chloride (available from swimming pool shops as
> calcium hardness increaser).  That dissolves easily in water.
> 
> Graham.
> 
> 
> -----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 Gilly Munavalli
> Sent: Friday, 11 June 2004 12:31 AM
> To: 'aquatic plants digest'
> Subject: RE: [APD] adding Calcium Carbonate
> 
> 
> I've gotten more to go into solution with heat and vigorous stirring
> obviously...  but still need large volumes of water to make that happen
> (3-5 gallons).  I loved having a sump to dump everything into and let it
> slowly dissolve without coating everything.  Unfortunately, with the
> increased CO2 loss and inherent flow instability with the hang on back
> overflow box accumulating air in the top of the U tube, I stopped using
> the sump :-(
> 
> I haven't tried supersaturating some water with CO2 from my tank and
> then trying to dissolve in the CaCO3...
> That would be cool to try 
> 
> I eagerly await other suggestions from the group
> 
> GM 
> 
> -----Original Message-----
> From: aquatic-plants-bounces+gmunava=yahoo_com at actwin.com
> [mailto:aquatic-plants-bounces+gmunava=yahoo_com at actwin.com] On Behalf
> Of S.
> Hieber
> Sent: Wednesday, June 09, 2004 6:04 PM
> To: aquatic plants digest
> Subject: RE: [APD] adding Calcium Carbonate
> 
> Above a certain pH, CalcCarb (CaCo3) tends to precipitate instead of
> dissolve. Something over pH 8 as I recall.
> anyone rember the value?
> 
> Scott H.
> --- Sean Kettle <kettles at videotron_ca> wrote:
> > What really helps it to dissolve is CO2 injection.  The carbonic acid 
> > does a nice job of dissolving the powder.
> > 
> >
> 
> =====
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> 
> 
> 
> 
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