We're snowbirds with a "pool boy" watching over our pool once a week all summer while we're gone. I've decided to take over pool duties (5850 gal cocktail pool) for the winter partly due to the chlorine and cyanuric acid levels he's left me with. I have my own strip testers and a basic Taylor kit (that doesn't test for CYA) but I took a water sample to my local Leslie's for a starting point. My FC was 0.04 and the CYA was 124. I've learned the only way to lower CYA is to dilute the water so I dumped 1/4 of the pools volume and added a gallon of liquid chlorine. Now my CYA is 106 (getting there!) with FC at 0.96. I'm going to need to go thru that procedure at least 2 more times to get the CYA to a reasonable level. I'll be using strictly liquid chlorine for the remainder of the season. I understand why the pool guy who only sees the pool once a week during the summer would use trichlor tabs for convenience, but with the tabs adding more and more CYA each week, how do I avoid the crazy build up of CYA requiring yet another water dump? Seems to me that using a product that continually adds an ingredient to the water that is hard to get rid of is counterproductive. How do you all keep the CYA at reasonable levels? Seems everybody is using the pucks; they're everywhere! Just doesn't make sense.