The water in my 20K gallon pool is not heating enough through the solar panels. I have 9 solar panels and the pump runs for about 6 hours every day. I get plenty of sun during the day. I have a 1 horsepower fixed speed pump, and I read somewhere that it might not be pumping enough water up the solar panels. Do you think upgrading to a 3 horsepower variable speed pump will result in heating the water more? Also, would you recommend Intellipro or Intelliflo pump?