[quote="StirCrazy"]
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Originally Posted by Bob_I
To begin with running bubbles through water does not add oxygen to the water. Gas exchange only happens at the water surface in a very thin layer where water meets the air.
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Bob you just contradicted your self. around every bubble is a water surface where gas exchange can take place. the reason a skimmer works very good in adding O2 to the water is 2 fold, 1 it creates a large disturbance which aids in driving off C02 and 2, it creats a extreamly large surface area (all the surfaces around the bubbles) to adsorbe the O2.
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I could prove that is wrong, it has something to do with surface tension, and if indeed there was gas exchange the tiny bubbles in a skimmer would never reach the surface because they would be absorbed. Unfortunately I can't remember where I read that, and I don't like unsupported statements, which is something you don't appear to have a problem with. I am also somewhat tired of it. you seem to feel that I make this stuff up. You will happily argue black is white, and vice versa. I just can't handle these constant arguments.
