So I started opening my pool this weekend raised the chlorine level and balanced the ph. Have a significant about of cloudiness the problem is I can only seem to run the filter for 2-3 hrs before it appears to be full and need to back wash. It’s a D.E. Flitter and it goes from 30psi. To 40psi and then the pump basket starts to empty and the flow rate slows down. It has been suggested to flock the pool but wanted some opinions first.