We have a 24 foot above ground pool with Hayward Swim Pro SW1000z4 pool filter and use a cc1500 cartridge filter that continues to break. The center cracks and separates from housing and straps holding paper pleats break. We have asked at numerous pool stores, no answer. We have model no. Sw15851x20tl motor. Pressure gage shows just about 20 psi. Never had this issue in past, thought it was filters but just bought different filter and have used new filter for about 8 hours and already cracked housing on filter. What could be possible causes? Pool does not filter properly and water becomes cloudy and dirty. Very expensive problem. Any help would be very appreciated.