Just thought I'd say, that after several epic partial drains and refills, I have now brought my CYA from 200 to 60, and have fully converted to BBB. I must say I was a bit skeptical during the switch, as it did require quite a bit of learning, testing, purchasing new items, and doing things in ways that seemed very new and unusual.
But now: WOW! My pool is absolutely the most beautiful and crystal clear it has ever been. Tonight I turned the pool light on and when I first saw the pool, for a split second I thought all the water had been drained out. I then realized that it was JUST THAT CLEAR! I could not even tell there was water in the pool. Simply amazing. And amazing that the entire pool chemical industry is based around what are border-line lies that create a self-perpetuating cycle of thinking you have to by more and more **** as your pool ages.