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

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

Good reminder.
 
I blame society for the diff. How can you expect a value to remain steadfast when it's so often taken for granted? Even theoretical constants are subject to revision, notwithstanding Einstein's jiggery pokery with what came to be just another Planck in the theoretical wall.

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: gbooth at frii_com
To: aquatic-plants at actwin_com
Sent: Thursday, March 9, 2006 12:31:29 PM
Subject: Re: [APD] Estimative Index for CO2 Dosing - Bah!


. . . 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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