I like to keep my KH
at 4 dh (tap is 3). I add Seachem's Alkalinity Buffer to raise my KH
slightly. I use 1/4 teaspoon once a week in a 10 gallon so far - I'm still finding the right dosage. So far this is working out. Adding the Seachem buffer will raise your pH. Like rkilling1 says, you can't raise KH
without raising pH. I saw my pH value rise from 6.8 to 6.9 when I added the buffer. I then adjusted the black knob on the meter to set it at 6.7, and the solonoid turned on.