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Re: [APD] CO2 revelations
Thomas Barr wrote:
> I addressed the O2 issue simply, I used a diffuser disk for CO2(no O2 gas build up occurs).
> But that did not do it __alone__.
> I wondered why.
> So I placed the diffuser disc near similar current like that produced by the venturi reactor after is starts mistuing the gas out the bottom.
> Lo and behold, Bam! Excellent similar growth.
We know that pearling happens after water changes because of the
capacity of water to carry dissolved O2 has been exceeded, and this is
usually due to a relatively rapid temperature change that occurs before
gases can equalize. Cold water holds more gases than warm water. When
the saturated water is added to the tank, the O2 from the plants can't
dissolve, and so we get pearling. I think we can all agree that this
I would speculate that using the diffuser disk near the output of a
filter causes pearling for a similar reason. If the gases that normally
build up in the reactor, and are normally vented to the atmosphere, are
forced into the water column by the disk, then we will get the same
effect as a water change. In other words, the metabolism of the plants
hasn't changed, but the dissolved gas level in the water column has been
Can we test either theory in a reasonably easy fashion?
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