Well more on CO2.
I am running just under 1 bubble a second, and my KH is 12 degrees and my pH is at or over 7.6 (yikes!). According to some online sources this gives me barely over 9ppm of CO2. Does this sound like a good amount? Or should I up the bubble rate? I am reluctant to up the rate too much as I am worried that my HOB filter will just outgas the extra, but I am not sure. Any suggestions?