Every morning I go out to my pool and find what looks like dirt lying in puddles on the bopttom of the pool. Seems to collect more near the filter end of the pool. I left my pool open all winter (we really had no winter in South Carolina) and ran my rover weekly. At the end of the swimming season last year I noticed this problem and vacuumed/scrubbed daily, and even vacuumed to waste but did not solve my problem. So here we are back to the puddles of what lloks like brown dirt. I have added a sock around the rim of my fliter basket in hopes that this may help. Any suggestions u all may provide would be greatly appreciated. Last water test was FC/5, PH/7.4, TA/100 CYA/90.