Recently, I had my pool opened, ans since then I've been having problems with my Hayward Pro Grid D.E. Filter 48 sq ft. When I open the pool, it was cloudy but not that bad. After the first hour that the pump was running, the filter already clogged up. I back washed it and added the proper amount of D.E. and it was good for about an hour so. After this, I opened up the filter and hosed it down. After running it for about an hour or so, it clogged up again. The next day I backwash the filter then soaked the grid's in Leslies filter cleanse. I put them back in, and it clogged up about an hour later. Does anybody have any suggestions?