Having a slow moving water problem after filter is pumping well for 15 minutes later. I then backwash, rinse, and then filter again and same thing happens. Have only had my filter system for a week. Did have high iron content in water so I'm guessing all that is filtering through. Check for air leaks and that doesn't seem to be the problem. Any ideas? Called Intex but customer service was not understanding my issue and said I needed to replace the motor. Well the motor seems to be running fine? I think its just a trouble shoot problem. What am I missing?