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

["Liz Wilhite" <satirica at gmail_com>]

That is meaningless.  If the pearling is due to water change alone you'd
expect to see twice more pearling from an 80% change than from a 60%
change.  You are comparing apples and oranges.

To find out if the pearling is due to exposure to air, drain off the tank
water, expose the plants to air, and add the same tank water back in.  That
will at least suggest air exposure has something to do with, but will not
confirm it, and certainly will not confirm that CO2 gas had anything to do
with it.

Jerry is dead on that there are multiple variables unaccounted for, and no
control.

My tanks pearl like crazy after a water change, even when they contain no
plants.


On 1/26/07, Thomas Barr <tcbiii at yahoo_com> wrote:
>
> > Not 100% convinced.
> > Try the same experiment again. But this time leave the level
> > of water in the
> > tank just above the leaves for 5 mins so they're not exposed
> > to the air?
>
> I've done this.
> I call it a 60% water change vs an 80% water change:-)
> There is a huge difference.
>
> > That way the only change would have been the exposure to the
> > air and not
> > just the addition of new water.
> >
> > Observe the difference this may or may not make?
> >
> > --
> > Stuart Halliday
> > http://theaquariumwiki.com/
>
> We don't see the same pearling, nor the same O2 levels
> afterwards.
>
> Regards,
> Tom Barr
>
> www.BarrReport.com
> www.sfbaaps.org
> www.gregwatson.com
>
>
>
>
>
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-- 
Liz
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