So if I go with the trichlor pucks, it is just trial and error to figure out the effect of adding since they take time to dissolve? If I look at the Mega Tabs from Leslies, each puck is 28oz, and according to Pool Math, that will raise FC 7.1 & CYA 4.3, and lower pH by 0.4, but that would be over the entire time it takes to dissolve, which may be like a week. So could I assume, that if it takes 7 days to dissolve, that I can divide those numbers by 7 to get an approx daily effect? Based on your response, I would still be adding liquid chlorine, but the use of a puck would help keep my FC consistent enough to avoid algae, so if this is correct, then I would need some way to figure out how much chlorine to add daily if I am using a puck and need to keep FC at the 2-3 range.