Just a quick follow-up. Looks like this pump will help me with my energy bills. I can also experiment with the amount I run it. I guess that would generate less chlorine with a salt water system? Can you run salt water systems on 4 or so hours a day? Also, I read the technology of the vs pumps by itself makes them more energy efficient? True? Or is the savings only from running at slower speeds. Sounds like it still would not be worth the additional cost based on price difference between the 2 speed and vs. Sorry to ask so many questions, but just want to make sure I make the correct choice.