Automatic shutoff on the fx5 is a good but bad invention. im guessing during the 2 minutes the filter is off to purge, the polly found its way into the outlet nozzle, and get stuck in there. found him tail sticking out the nozzle with all the blood rushed to the back of his body and bulging eyes and flared gills due to the massive water movement from the fx5. man what a waste of fish. so sad.