In your pool, every cup of 8.25% bleach will add about 1.2ppm of chlorine. Use that to help you figure out needed doses of chlorine. Your needed chlorine range is based on your CYA level. Read more about the connection between CYA and chlorine here:> http://pool9.net/cl-cya/

What kind of granules are you using, dichlor or cal-hypo?