I am having trouble keeping a prime flow through my pool filter. Half the time I have to bump the filter when starting, or sometimes I can just turn it on and i have great flow. After it runs for about an hour the flow reduces and the water level in the pump bucket goes down to about 3/4, and the gauge reads good at about 22 psi. I have checked out some of the obvious probable causes....water level to the skimmer, blockedges, places where the filter may be pulling in air. I cant find anything. The filter and the pump motor are brand new, so im assuming they are working properly. I have a hayward D.E. filter.
Hoping someone can help