We have what appears to be very tiny white specs throughout the pool water. I would not consider the water cloudy at all and can't really see them from above the surface, I really only notice if I'm under water with goggles on. They don't hover around the surface or sink to the bottom, just float around throughout the water; doubt you'd even see them if I tried to take a picture with an underwater camera. The quantity doesn't seem to be increasing by much if at all, hard to tell.
All searching I've done on the site returns cloudy water, larger pieces, etc., so doesn't seem to match. I'm assuming this isn't harmful in the least, and I should probably just ignore it since you can't see it from the surface, but am wondering if it indicates the filter isn't working as well as it should. We have a cartridge filter and I believe they're supposed to pick up particles smaller than what I should be able to see? The cartridges looked a little worn (just purchased house), don't know how old they are; the PSI was around 13-14 when first opening the pool, around 15-16 now.
I'm sure the answer will be to ignore it, it's fine, but I'm a bit of a perfectionist and still wonder if anything could be done to help clear it up.