We opened our pool 20x40 in ground and then lost electric to pool had trees taken down a couple of weeks before that and must have broken the line then .It took almost three weeks to fix so pool is a swamp.I have de filter Haywood 75 and new motor.Filter has high pressure but low flow after maybe 10/15 minutes.Gave filter acid bath so it’s clean.Have been working on this for 2 or 3 weeks now have changed de and cleaned filter 5 or 6 times already.