It is physics when talking about the surface to volume ratio of gas exchange and
other physical principles that affect the movement of gas
http://www.scuba-doc.com/physics.htm
there also is the chemisty, which affects CO2 more because it chemically reacts with
water
http://www.science.uwaterloo.ca/~cch...waterphys.html
Saturation is not the only goal of aeration. Good aeration also moves other kinds of
gases out of the water. Which is why experts like the Goldfish Guru recommends at
least 1 large airstone per 10 gallons of water. Ingrid

(Mick Manford) wrote:
Yes gas
exchange can take place as the bubbles ascend but if things are pretty
much at saturation already its not needed.

It ain't physics by the way - its chemistry.



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