So I am using Suncoast Gold Liquid Chlorine from Pinch-a-Penny to SLAM the pool. When I am using Pool Math to help increase chlorine back to my FC SLAM level, what do I tell it as a sanitizer that I am using? For instance, my FC needs to be 20. After an hour, it is down to 15.5. How do I figure out how much Suncoast Gold Liquid Chlorine to add to get it back to 20?