Re: [APD] CO2, water changes gas phase Vol1

[Jerry Baker <jerry at bakerweb_biz>]

Liz Wilhite wrote:
> There's a really easy way to do all of ths without going around the world.
> Get some plants established in pots in a 10 gal. tank containing no
> substrate except what is in the pots.  Rais the pots so the leaves but not
> the substrate are out of the water for 10 minutes then lower them back down
> .  That's crude but would be suggestive of  the effect of exposure to
> gaseous CO2.  Ideally that would be done under a variety of different mixes
> of Argon (or another inert gas) and CO2 with the amount of CO2 in the gas
> varying between 0% and 100%.  Oxygen should not be present in the gas mix.

That's an excellent idea. I believe the initial aim of Mr. Barr's 
experiment was to test the hypothesis that exposure to gaseous CO2 will 
increase oxygen production in aquatic plants, and I think there may be 
better (read easier/cheaper) ways to go about testing that hypothesis.

Someone should create a list of experiments "To Do" on a page somewhere 
so any interested aquarists or magazine authors could find a good 
research project if they are so inclined.

> Interestingly enough, everytime people report seeing effects that have been
> "disproven" there is always an assumption that the people did "something
> wrong" or "think they know what is happening but don't" rather than looking
> and saying that perhaps the "proven truth" wasn't really proven and isn't
> really true.

Some of the best scientific discoveries started with, "Hmmm, that's 
strange" when an experiment doesn't end the way we expect.

-- 
"He who throws dirt is sure to lose ground."

Jerry Baker
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