Filter is not filling to top. Pressure air release on top does not have any air or water shooting out. Cleaned fingers with acid bath, replaced top gasket. Psi is 15 after cleaning. Prime basket has air bubbles. Have checked lines from skimmer and found no leaks. Dug up lines and no leaks. have tried everything I can think of. Any suggestions? System worked until cleaned fingers with acid bath. Also lubed o-ring on prime bowl. It returns water to pool but suction is very minimal only fills prime bowl to about half full.