Falls at Night
I like the photo, and also agree with the previous comments, except about it being soft. The area without water looks sharp enough, and f16 should give you a deep depth of field, depending upon your point of focus. I like the silky look of the flowing water, but the lighting on the waterfall itself is not ideal and the blown out white spots on the pool detract from the waterfall. If you have a bright portable light, I wonder if you could use it to illuminate the falls and reduce your exposure, so the existing lighting on the pool isn't as distracting.