I just purchased a house with a pool. Due to some construction on the house, I made the mistake of not keeping up with the pool. The previous owner had 2 unicel filters that had broken bands. My problem is the pool wouldn't get beyond cloudy, so I purchased a new unicel filter. Problem is flow decreased greatly with the new filter. So much that I can't see any flow into the skimmer. There is water movement, but water barely comes out the jets. If I remove the filter I get strong flow, and the same if I put back the old filter. Shouldn't a new filter be less restrictive?