I hope to get my kit in next week. I've stop using pucks and starting on BBB. Sounds like my only option is to drain 1/2 the pool. The pool store try to sell me CYA removal. Anyone heard of such? Expensive though, $45/gal. to remove 50ppm/10,000 gal. Anyway with my CYA over 200 is it safe to keep the FC that high. The water is clear with a hint of green tint.