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Old 04-11-2003, 03:55 PM   #10
digger
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Stat is right. The concentration of CO2 in the atmosphere is much higher than what we have dissolved in our fish tanks, otherwise our tanks would look like a can of Coca-cola. A good rule of thumb for fishtanks is 15 ppm (.0015%) of CO2, the atmosphere is about .035 % CO2. The pressure of the water drives the CO2 out of sollution, so we increase the contact of the CO2 with the water.
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