Rio pumps over all have a bad rep for not starting back up after turning them off. This is often the case on PH
's that have been running for a while. Often if you take them out and break them down and clean them up they will run again for a period of time until you need to clean them again. I cant say the same for maxijet. Maxijet PH
's seem to run forever with out the need to clean them. Of corse cleaning them will help their performance as gunk collects on the impeller and shaft but maxijets almost never just out of the blue fail to start.