I just installed a 24' above ground pool with a sand filter in July from a place called Watkins. Everything was going fine I would hook the vacuum to the skimmer and vacuum, then backwash, then rinse. The last 2 times I vacummed I forgot to backwash and only rinsed. After each time I noticed the next day the fine dirt was back in the bottom of my pool. I realized what I was doing wrong so yesterday I vacummed, backwashed, then rinsed, but today the dirt was back on the bottom of my pool. The water is also cloudy and greenish, but I am more concerned with the dirt returning after vacuuming, backwashing, and rinsing. Can anyone help me?