Since my pool was filled (December 2019) I have been gradually raising the CYA. The pool guy started out with chlorine pucks when it was too cold for the SWG to run. After startup was complete, I began adding solid CYA a couple of pounds at a time using the sock method. I am up to a total of 10.5 lbs of CYA added to approximately 17,000 gallons over about 6 months, but I'm reading my CYA test at around 50 ppm maximum. Some days I swear I can still see the black dot at closer to 40 ppm. Based on pool math, I was expecting the reading to be higher by now. Is there anything I'm missing here? I really don't want to add too much CYA. I'm topping up the pool regularly due to evaporation, but I am not backwashing or doing anything that causes a lot of water to be lost from the pool. Any suggestions on what is happening here? I suppose I could take a sample of my water to the local pool store and see what they come back with on the CYA test. Thanks in advance for any insight you can provide!