New pool owner; older pool. Two skimmers. Lots of trees and crepe myrtles around the pool so I'm constantly battling the leaves and pollen in the pool. Last night I noticed that one skimmer wasn't pulling any water and the polaris wasn't working very well. This morning the 2nd skimmer wasn't pulling either. The filter PSI was at 25. I backwashed the filter and put in the DE. The filter PSI is now 7. The 2nd skimmer is working better now. However, the other skimmer and the Polaris aren't working at all. Any ideas what the problem is and how to fix it?