I switched to bbb in 2013. Cya was well over 100. Last year cya was registering around 40. This year I could still see dot so I knew it was below 30. Pool store said it was 27. I am using around 1 qt 2 cups per day. Last year I used that much bleach every 3 days. I would like to raise cya. I read about sock method in front of jets but I have young children in pool all day. What would be better cyanuric acid in sock in skimmer. Adding dichlor or trichlor. Would like to get cya up around 40 again and see if my chlorine consumption goes down. I have 15000 gallons above ground with sand filter. My pool is crystal clear. I get my FC up to 6 every evening and by the next evening it's around 2.5. CC is 0