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DIY CO2 Mixtu A definitive Answer?
"David Wee" wrote in message
... Another thought: It seems that one can achieve a maximum CO2-water diffusion *rate* with a powerhead/filter intake + bubble system, but retention of the CO2 will be based on the water chemistry (pH, kH, not clear on this, but indeed it seems chemically related). check out http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm Assuming no other buffering ions... there is a direct relationship between pH, KH and CO2. Chuck Gadd has a calulator ... "The formula used for this calculation is: CO2 (in PPM) = 3 * KH * 10( 7-pH ) where KH is Carbonate Hardness in degrees. " The (7-pH) is an exponent, the formating got lost in the cut and past. I don't think water chemistry has anything to do with CO2 retention. That is controlled by somebody or other's laws (hey it been 30 years since college) that govern diffusion and etc. Bob |
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