This just started. Pump runs about 11/12 normally. Now, lots of suction at the skimmer. Low pressure at return jets and the pump is running at 5/8PSI and surging. Took the pump apart, lubed the rings, impeller turning fine and started it up, no change. Back washed filter and glass is clear. Must be a clog, but where. FYI solar heaters in line which are off. Easy solution please, just heading away on vacation & house sitter coming over. Not relaxing!