What kind of chlorine levels should I be targeting? I finally got my system up and running this weekend and appears to be working great. My carbon was salvageable after sanitizing it's removing the chlorine fine. I finally got my chlorine test kit and I'm seeing about 1.4ppm total and 0.25ppm free chlorine. I'm interpreting the free number as being just barely enough. Do I want a higher number so that I have some margin against changing water conditions?