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Old 24-02-2003, 02:24 AM
LeighMo
 
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Default water testing, and a chemistry lesson

Injecting CO2 into water will lower the pH and raise the KH.

You're half right.

Injecting CO2 will lower the pH.

It *might* raise the KH if you have something in the tank that will dissolve
with more acidic water. But most of us don't. Most people don't put anything
in their tanks that will dissolve in the water and increase its hardness.

For the vast majority of planted tank keepers, adding CO2 will not affect KH.


Leigh

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