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Re: Flourite/Phosguard question
- To: Aquatic-Plants at actwin_com
- Subject: Re: Flourite/Phosguard question
- From: Paul Sears <psears at nrn1_NRCan.gc.ca>
- Date: Mon, 20 Mar 2000 13:47:11 -0500 (EST)
- In-Reply-To: <200003172048.PAA20803 at actwin_com> from "Aquatic Plants Digest" at Mar 17, 2000 03:48:01 PM
> From: "Rubin, Michael" <mrubin at visa_com>
> Subject: Flourite/Phosguard Question
> lauramark <lauramark at home_com> wrote:
> > Has any body had a problem with the combination
> > of Flourite and Phosguard removing Kh from the
> > water.
What is Phosguard, and why are you using it? If it's something
that removes phosphate by ion exchange, then maybe it will remove
bicarbonate as well.
> > I've recently sent up a 90g about 3 weeks
> > ago. It's going through a wet run with Flourite and
> > Phosguard, nothing else. All equipment brand new
> > and rinsed very well. From the tap Kh=4, Gh=7 and
> > Ph=7.2. I tested the water and the Kh was 0, Gh was
> > 5 and Ph 6.7.
> If you've got a lot of light and no CO2 yet (as is sometimes the case in new
> tanks) your plants will use carbon wherever they can find it. CO3 has
> carbon in it. If this is the case your KH will drop like a stone.
Removal of KH will only happen if you have lots of KH and GH and
little CO2 in the water. Some plants can take CO2 straight from HCO3-,
and the net reaction becomes:
Ca++ + 2(HCO3-) -> (CO2 to plant) + CaCO3 (precipitates) + H2O
You certainly can't reduce KH to zero by this method.
Paul Sears Ottawa, Canada