I have a 28,000 gallon pool with Nature2 filter built one year ago. This was recommended to me by our pool builder (as opposed to having a saltwater system). I had terrible scale buildup over the first year, at least that's what I would call it. Just abundant white, chalky flakes of material in the pool. The guy who services my pool thought it was do to the type of chorine shock I was using which had calcium in it. He recommended I switch to another type of shock; so far that has improved things a bit. Has anyone ever had this problem with a new pool? What is your experience with a Nature2 system? Thanks for your advice!