Equipment

I just cleaned out my circ pump intake, and changed the filter socks, emptied my skimmer basket (rinsed the gunk out as usual and the skimmer started overflowing almost immediately, and now I cant get it to go slow enough not to overflow unless I lift the skimmer up by an inch. Any ideas what is happening? all parameters seem good except the nightrate seems a little high at 20-40 ppm. the skimmer seems to have been working properly for months. cleaning the intake on the circ pump really increased ...