Hi, we're in the process of receiving pool proposals for what will work out to approximately a 35' x 16' pool with 7' x 7' spa, no other water features. It seems most PBs in our area recommend a VS pump of some sort. Many seem to be proposing 2 HP. I've read during the swim season you want to turn over your water twice. I've also read that you're much better off running a pump 24/7 vs. say 8 hrs a day for peak cost efficiency. What I'm wondering is, how do you really size the pump to insure you turn the pool over those 2 times at the most cost efficient pump speed? I don't want to pay for a 2 HP VS pump if a 1.5 HP VS will work just as well for my pool size with less up front cost.