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Thanks for all the additional responses. I'm in the process of replacing ~30% of my water, hoping to drive down my CYA level to ~70.

Would a good approach be: A) drain from deep end using my cover pump while simultaneously filling with hose at shallow side, and run filter as usual keeping current water level (for i.e. 24 hrs), or B) drain below skimmer level with filter off and fill afterward with hose (for 24 hrs)?

Jason, Thanks for the informative response. As I understand it, in order to lower my CYA, I would need to partially drain the pool (try 20%) and then refill. Is this correct? -Greg

Hello, I am a 7-year pool owner located in metro Atlanta, trying the BBB method for the first time this season. I would like to avoid Leslie's chemical route (think it's a ripoff, a visit to the store is always a haggle, bad customer service, etc.) I have been treating pool every other night...