It seems like I have to backwash my pool 3-5 times a week. My pump stops pumping water. Once I backwash, the problem goes away, but most likely comes back the next day. When I backwash the water is clear. I add DE and the next day, and I have to backwash it again to get the water moving. I've broken down the filter multiple times. I know the filters are good because they are fairly new. What else could be my problem? I'm tired of washing away DE all the time, and I'm afraid my pump is going to burn up. Thanks!