I know, another thread on dirt on the bottom of pool. We have done everything we could think of to fix this problem. We needed a new multiport valve, replaced that the begiinning of this season. Pipe underground was busted, hubby fixed. We installed a new pump and motor about 3 weeks ago because of cracks over the winter. We spent a day slamming the pool and still have the debris settle at he bottom of the pool. We get alot of cottonweed in our pool. We decided to try put skimmer socks on the returns. And while they are on, we do not get the dirt at the bottom of our pool. The socks do not look that dirty though, so we decided to do an experiment and take them off today. Within 20 min. we already started seeing the brown debris settling on the bottom. Only problem, with the skimmer socks on the returns, we do not get the water moving around like it should. We have added cellulose fiber to the filter, but that does not seem to keep the dirt from settling on the bottom. My water is crystal clear. Could it be something wrong with my sand filter. We replaced the sand and didnt notice anything cracked or broken when we emptied the old sand. Are we doomed to have to vacuum everyday.