I am new to the BBB method but can not seem to get my FC high enough to keep algae down. My CYA is 100 and I flocked about a week ago and vacuumed to waste approx. 6in down then did a refill. It did not lower the CYA. I continue to pour bleach in at high levels but it is not helping. I am spending $30/week on bleach so I am looking for some help. Is draining half my pool the only answer...I have an inground liner pool with 36,000 gals. That is a lot of water! Thanks for your help!