i like the outflow on my fx5. i am going to get a few more. they are awesome. i don't turn my fx5 off when i do any wc. unless i shake it up to clear the loose crap out. just let it run and don't drain past the intake. the flow in the shallower water stirs all the crap up and allows for better cleaning. nothing worse then adding water and finding that hidden pocket of crap.