CO2 loading on the surface of water

[Ivanstein at webtv_net (Ivan Trail)]

In light of the recent discussion of the CO2 levels on the surface of
the water in a tightly closed tank, I would like to share my theory, of
which I have put much thought into.

One question first:  Why would anyone put a tightly sealed cover over
their tank?  I personally have never seen a pond or lake in the wild
covered in this manner.  Maybe there is a reason I don't know of.  If so
please tell me.

Now, back to my theory.  The law of partial pressures states in a
nutshell, "The gasses in a given container will be evenly distributed
through out."  This is why there is no cloud around a smoker.  The smoke
seeks to make a balance with all other gasses in the room.   No fog
around your face on a cold day.  No green cloud of foul aromatic esthers
aruond a person who has just eaten Uncle Bob's Flamin Hot Chili.

We know that in a tank with fish, enough O2 exists to support the life
of the fish.  The evidence is obvious.

So, if the CO2 dissipates out of the water, then so should the O2 and
whatever other gasses are present in the water.  thus the layer above
the water in a tightly covered tank should be made upof the same gasses
in the same proportions as in the water, all equaly mixed.

now that only leaves to assume that since the gasses in the water are
able to support life, then the accumulated gasses will support life
also.

Just the thoughts from my humble brain.

Ivan

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