Pool is 18x36 inground with vinyl liner. Other outlet is main drain. Flow at returns is ok had a friend over and he said my flow from the returns was better than his. When pool initially starts there are a few airbubbles but they fast disappear.
No pine trees just a couple of palms and a couple of pecan trees. Filter is back washed once it reaches about 19 - it usually starts at about 10. Tried to run on circulate but pressure was only about 6 or 7 so return it to run on filter. Pump basket doesnt have any air in it at all. Have had to replace spider gasket and also I have replaced the multiport valve but pool was running well once these were changed out. Have also replaced seal on pump basket lid. Pump was replaced last year (Hayward Super Pump)

If it is a clogged impeller would I be able to do that or would it be best to call out a pool repair service.

Thank you so much for your replies I am needing all the help I can get on this one!