I’ve only had this outside about 2 weeks and the pump doesn’t work well at all.  I set it to medium as the directions stated and it was fine for about 2 days.  It went down to a trickle, so I pulled the pump out, took a slight amount of debris off it, turned it up to high and  it worked beautifully for maybe 12 hours.  The next morning it was back to a trickle. This afternoon it failed again; after verifying the pump was clean and set on high, I unplugged the unit, plugged it back in and it worked.  It’s been an hour, so I checked and it’s back to a trickle.  I don’t have the patience for this and will contact the manufacturer.