No, because different brands of pucks are different sizes (some are 6 oz., some are 8 oz., etc.). What I mean is that as the puck adds chlorine it is also adding CYA so when 10 ppm of chlorine has been added over time then the puck has also put 6 ppm CYA into the pool. Since average chlorine loss in a pool is 1-2 ppm per day if your puck is maintaining the FC level then in 5-10 days the puck has added 10 ppm chlorine and 6 ppm CYA. Assume your pool loses 1 ppm FC daily, then in 10 days your CYA has increased by 6 ppm and in one month your CYA has incrased 18 ppm. IF you are starting at a CYA of 30 ppm this means your pool is overstabilized in just a few months! (Also, since higher CYA levels need higher FC levels, if you try and increase the FC by using trichlor pucks by turning up the feeder or floater then you start adding CYA even faster!)