I noticed some algae build up and noticed that my pool was not circulating. I took out the filters and cleaned them thoroughly. No change. Pump is not priming. I cleaned out the impeller. The pump turns on and sounds fine. It won’t prime or even fill the filter housing. If I turn the valve to drain the pump will start draining the water. So the pump seems to be working. It’s spring and the pool getting a ton of oak pollen and such. My thinking is I have a clog somewhere. Pool level is fine. Weir is working. Skimmer is getting zero suction when pump is on. Smaller pool. One skimmer.