There are several things that keep this waterfall fountain from attaining 5 stars.  Trough on top has no way to drain rainwater to keep mosquitoes from breeding necessitating using other a siphon pump or mucking the water out, pump does not come with a throttle valve to adjust flow and to prevent high flow over the spillway which then splashes out of the water trough (you’d be filling this every hour), a combo of water trough too shallow, the drain holes are placed too high in the trough, and trough walls too low in relation to the water spillway.  Back of waterfall is open, allowing mosquitoes to enter and breed in the relatively still water.  I had to make modification to whip this waterfall into carefree shape. It appears to have been developed by an artist and not reviewed by an engineer or guided by user critiques before going to final design.  Send it back to the drawing board for optimization.