Quote:
Originally Posted by Carissa
Adding x ppm of co2 will lower the pH by x amount no matter what the hardness of your water is to start with. A tank with sufficient injected co2 will be about 1.0 pH lower than if the tank had no injected co2. So if you are starting with 8.0 pH, after you inject co2 you will be down to 7.0. If you start at 7.0, you will go down to 6.0. Hardness does not change this calculation.
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Is there a limit to how much CO2 can lower the pH in water that has very high KH?
Assume water with a very high KH that produces a pH of 9+ without CO2 injection. Would injecting CO2 move that pH at all? Would it lower the pH below 8.0?
Bill