Re: [APD] Estimative Index for CO2 Dosing - Bah!

[Vaughn Hopkins <hoppycalif at yahoo_com>]

If I buy some distilled water, add a bit of baking soda, let it sit for 
a day, then measure KH and PH, will I have measured the CO2 in the 
water that comes from equilibrium with the atmosphere?  (I swear I 
won't breathe on it!)
Vaughn H.

On Thursday, March 9, 2006, at 10:25 AM, S. Hieber wrote:

> Oh we can determine the value, we just can fix the conditions ;-). I 
> suppose some would call it glass half full, glass half evaporated into 
> the atmosphere.
>
> sh
>
> ----- Original Message ----
> From: Vaughn Hopkins <hoppycalif at yahoo_com>
> To: aquatic plants digest <aquatic-plants at actwin_com>
> Sent: Thursday, March 9, 2006 12:57:15 PM
> Subject: Re: [APD] Estimative Index for CO2 Dosing - Bah!
>
>
> Thank you George.  We can send a man to the moon, but we can't
> determine the equilibrium value for CO2 in water.  Tsk tsk.
>
> Vaughn H.
>
> On Thursday, March 9, 2006, at 09:31 AM, gbooth at frii_com wrote:
>
>> Someone mentioned CO2 equilibrium values.  This was beat to death back
>> in
>> the 90s and the theoretical value for CO2 equilibrium was 0.485 PPM
>> (at a
>> specific temperature, etc).  However wonderful that theoretical number
>> is,
>> the practical value is around 2-3 PPM.  Resolution was never reached 
>> on
>> why there was a difference but it was probably due to either
>> A) biological respiration (bacteria, algae, plants, fish) keeping
>> ahead of
>> diffusion to the atmosphere,
>> 2) the contrarian nature of aquarium water.
>
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