I am having some confusion with my pool guys...I have a 27,000gal pool by their measurements and they have recommended a Pentair IC30. I find nothing on google when I look up the IC30 - only the IC40 comes up. I am in the process of switching my system from a copper ionizer and I am very new at the pool thing. As in I have no idea what half the things posted in this thread mean. I do know I have a Heyward pump. I researched and talked and read and chose to go with Pentair because I really liked/trusted this pool company I chose and they are a Pentair warranty company. Reviews on the two systems made me lean Pentair. I had thought it would be the IC40 they put in but they are saying with my size pool I need a IC30....can someone advise if this sounds correct?