Just a quick note to say that using the BBB method is GREAT!!!! We just installed a above ground 15X30 with a SWG system and things are going just fine. Clean, clear water and no problems. This is our first pool and I followed the recommendations of the pool calculator initially then carefully watched things for the first couple of weeks. That's been it! I keep testing the water waiting for something needing to be done and so far I'm getting tired of just testing-It's almost anticlimatic. Once ageain thanks. If anyone is considering using the BBB method - Go For It!