Re: [APD] phosphates and co2 table

["S. Hieber" <shieber at yahoo_com>]

If you want to lower pH a little, adding CO2 will do that since a small portion of the CO2 you add forms with water maolecules to make a weak acid called carbonic acid., Carbonic acid reacts with carbonates, thereby lowering the KH ever so slightly. KH raises the pH. So if you know the KH and pH, you can extrapolate the CO2 level, which is what the table presents.  Some phosphate compounds muck that up. But you can skip the phosphate-based conditioner and use a carbonate if you wanted to add a pH buffer or raiset he pH. Baking soda, for example works fine for this purpose.
 
sh
 
* * * * * * * * * * * 
The Northeast Council of Aquarium Societies (NEC) celebrates its 50th year of service at its 31st annual convention, April 7-9, 2006 -- including *An Evening with Aquarium Legends*.
 
Read the speaker list, then download the registration form, and get set to join the fun at what promises to be the year's biggest tropical fish convention.
 
http://northeastcouncil.org/html/
 
And while you're there, attend the AGA's annual meeting Friday afternoon (2-4pm). This year's speaker is Claus Christensen, Tropica's Managing Director. 


----- Original Message ----
From: Joel Fizette <sentientpuppet at gmail_com>
To: aquatic plants digest <aquatic-plants at actwin_com>
Sent: Tuesday, March 7, 2006 1:42:15 AM
Subject: Re: [APD] phosphates and co2 table


ok I don't have a TDS meter nor the money to buy one right now so what
exactly AM I supposed to do... I've been reading so many conflicting
viewpoints its kinda frustrating... I have been coming across this point
about how pH doesn't really matter to the fish but the rest of the world
seems to think it does. Like what about how people are always talking about
how certain fish "like" a certain pH level? What your saying is that they
like a certain osmotic pressure? Which is somehow related to the hardness of
the water?

On 3/6/06, Jerry Baker <jerry at bakerweb_biz> wrote:
>
> Jerry Baker wrote:
> > My understanding is that the phosphate interferes with the reaction of
> > CO2 and water.
>
> I should have said interferes with KH readings. In your case KH tests
> will show a higher value than you actually have because they will be
> measuring the phosphate also.
>
> --
> Jerry Baker
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> Aquatic-Plants at actwin_com
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>
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