I'm buying a house with a solar, salt water pool, 25 K. It has two pumps, one for the solar and one for the filtration system. The pool inspector found it amazing that there would be 2 pumps. The solar pump (1/2 HP StaRite) does not run and needs to be replaced. The pool inspector thought I should replace the pool pump (North Start 1.85) and the solar pump with 1 variable speed pump. I'm wondering if this is good advice or good salesmanship. House was built 10 years ago, and I suspect that pool was built around the same time. Any thoughts?