My Jandy VS 1.65 horsepower pump has bit the dust - pool company says it's due to a corroded shaft. It's less than 7 years old. I'm considering the Circupool VS as a replacement. Circupool says to get the 3 horsepower model, but my pool company says that's too strong for my DE filter. First, how has the Circupool VS been holding up if you have one (or a Calimar which seems to be the same). Second, should I listen to the pool company and get a lower horsepower model?