The Planted Tank Forum - View Single Post - 30ppm CO2 (rusty brain)
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Old 01-22-2013, 01:01 PM   #2
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It certainly does not contain 30ppm of CO2. There are other things in the water that can alter the pH or KH. That's why I really don't understand how these pH/KH/CO2 tables are supposed to be of any use.
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