Each 3 quarts + 1 cup of 6% bleach will raise your FC by roughly 2 ppm, each 2 gallons will raise it by 5 ppm. To see what your levels need to be, you need to know the CYA level....once you know that, then you can use the link in my sig for the "best guess chlorine table" to see where to keep your chlorine levels.

Janet