I know the pucks have gotten my CYA levels too high. It is around 120. My pool is above ground and holds 10,000 gallons of water. Does anyone know how much I need to drain to get my CYA levels back in check? I'm draining it now and it is down about 8 inches. It is 13.5 x 27 feet. Also, if algae is growing in my pool there can't be enough chlorine to hurt my plants can there? During the warmer months I'll be back to BBB. I only use the pucks in the fall and winter because I don't have time for the pool then. Any help would be most appreciated.