I know this is a FW question but I hope you might be able to help me out with this. I am able to keep my PH around 6.8 and thats where I like it and would like my KH around 4 but it is staying around 1.3 and I am concerned about PH swings as I have had a couple that I am aware of. I was wondering how I could raise my KH without affecting my PH so any ideas???