We just purchased our first outdoor water fountain: On the second tier, the grooves where the water runs down was not cut out enough. My husband took tool and tried to make the grooves even so that the water would run out the same. It may still need to have grooves dug out but when the water falls to the bottom bowl, it is splattering to the ground and keeping the concrete below constantly wet.
pic of fountain
pic showing where the floor is always wet in front of it.