Does anyone know approximately how much chlorine and CYA is in each 3in puck? I'm trying to determine how much my current CYA level of 50 will raise after 3 months of using a puck each week for 12 weeks? Also if my current FC is 3, will 1 puck in a floater keep it a level of 3 over 1 weeks time with no swimmers and avg temp of 75 or will it drop to 2? I know that I will be adding liquid chlorine occassionaly to keep the FC in the 3-5 range, but just wondering what affect pucks alone will have over a month to month time frame? Thanks. It's a 20K Gal pool.