I can not understand why my CYA is reading high. I have a taylor kit. I lost a lot of water over the winter, so I opened my pool with 3/4 fresh water fill up. I used city water. I used 2 pounds of dichlor shock, like I do every year. I have not added any more chemicals. That was a week ago today. My test today was ph: 7.4 FC: 8 TA: 100 CYA: 90. I do not know why I have such a high cya when I filled more than half the pool with new water and I did not add any stabilizer. I used some strips just for giggles and it showed my cya is low. I do not know what to believe.