After seeing your volume, I remember doing this before somewhere up in this long thread. In a 5061 gallon pool, each quart of 8.25% bleach will add about 4ppm of chlorine. Each cup will add 1ppm. Use those as a reference to figure out how much bleach you should add to get to shock level which is based on your CYA. http://pool9.net/cl-cya/