Just a quick HI to everyone on the board. I have been using the BBB method for 2 1/2 years with no worries. Before that, it was a every year battle with alge and the pool store telling me to spend, spend, spend. Funny, one year I actually spent more money on chemicals than the pool cost. I have had Intex pools for the past 7 years and hopefully will upgrade to a 24' AGP next year. That is the reason for such a large filter on the pool. I think of it as my Chevy Vega with a 454 under the hood!