My pool water is very clear but I have a lot of dirt on the bottom of the pool that I don't seem to be able to vac out of the pool. When I vac it, the dirt disappears but I can see the return jets bringing non-clear water back into the pool. When I have finished, my clear water has turned cloudy and will stay that way for about a day. It seems as if the dirt is being recycled back into the pool and then settles back down to the bottom again and the sand filter is not trapping the dirt. This is the 3rd season for this Hayward filter. I had the same problem last year. I tried new sand at the beginning of last seaon but that did not help. I also added a SWG last season along with a new liner, and new city water. I get a tremendous amount of scale build up on the SWG cell. I have tried sweeping the pool on waste but still can't get rid of all of the dirt. Seems like a filter problem, but all I can think of is new sand again. Any suggestions?