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Re: [APD] CO2 and pH control

Gordon and Susan Watkins wrote:
> Nope, after 20+ hours it still shows 8.6

If your pH test is correct, and there are no other buffers in your water 
aside from carbonates, then your KH is around 40, not 9. I would be more 
inclined to believe that there are additional buffers, but I'm not sure 
what other buffers would increase the pH like that.

Jerry Baker
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