We've had our pool (with a new Pentair filter, Pentair VS pump and new plumbing) for about 6 months and in just the last month or so I've noticed a lot of fine dust/dirt on the surface of my pool that I can't get rid of.
I backwashed, which didn't help. I cleaned the filter. Still no difference. I put a thigh high sock on the skimmer basket, which caught a lot of junk but there's still a lot more floating around.
What could be causing this surface dirt and how do I get rid of it?