Hello everyone, I was wondering if anyone can help me try to stop this problem. I have never owned a pool before last year and the previous owners of our house didn't take great care of it, in my opinion. But we have some trees on lot and our neighbors tree are very close to where the pool is. Last year after a frustrating experience opening the pool, I kept finding what I would describe as powdery dirt on the bottom of the pool, and along the seams in the liner. If I vacuumed one day it would be back the next. Our pool store said it is probably pollen among other things and eventually suggested a skimmer "sock" to reduce it and it really has not helped. After lurking on this forum, I have read some posts similar to my problem and people suggest that it may algae, and that is very difficult to get rid of. So after a long winded explanation of my issue, Is there any way I can tell which is which?

Thanks,
DJ