I just had a quick question regarding CYA. We had our IG Pebbletec pool just completed at the end of July and only used chlorine pucks for about a week before I found this website. After only using the pucks for about a week and a half, I switched over to the BBB method and tested the water using Taylor 2006. Right away my CYA was 90 so I was wondering what could be causing the high CYA right off the bat. I doubt a week of using the pucks caused it to rise that fast. Could it be the new pebbletec?