When I opened my pool I did a CYA test. The CYA is down to 25, due to draining water before closing our pool last season, and adding water this season. So, I would like to raise CYA to about 40.
I am using liquid bleach to regulate my FC levels, but I am also using a chlorine 3" puck to slowly increase CYA. Does anyone know roughly how much one chlorine puck will raise CYA in a 19,300 gallon pool? I can keep doing a CYA test after each puck dissolves, but that will take a lot of solution from my test kit. I was wondering if anyone knew approximately how many pucks I would need to use to raise the CYA level from 25 to 40.