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Old 01-12-2013, 04:27 PM   #5
DarkCobra
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Probably. The pH/KH method of CO2 measurement is highly dependent on both accurate measurements, and carbonates being the only significant alkaline buffer. But at 8ppm, even if it's reading half the true CO2 amount (16ppm), you can still double the amount of CO2. Just keep an eye on the fish, they'll tell you if something is wrong.
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