Going to start a new tread on a issue I am having to see if others are having similar problems. About every 3 to 4 months my sump pump will not restart after I do a water change. I traced the problem to a dirty/gummed up Impeller. Once I replace the impeller the pump works as normal. Not sure of the source. Has anyone else seen this problem and come up with a solution. It not a big deal to pull the pump and swap the impeller but I would think there should be a better fix.