Hi ChuckD - I did try brushing the sides on bottom of the pool to see if I could reproduce the cloudiness - I kicked some sediment up, but it didn't get as cloudy as it does when we're in there swimming.

I was doing some Googling and noticed that Polaris sells an Ultra Fine Sand/Silt Bag for the 380. The filter bag that I used right now is the one that comes with the 380 which is called an "All-Purpose Zippered Bag". Does anyone think this will help in collecting the particles the cartridge isn't getting?

Or maybe I'm just not running my pump long enough?

Would using one of those clarifier products help?