We were contacted by a couple, who wanted to have a waterfall added to their existing salt water pool. For me, the only challenge was getting the waterfall over the existing pool deck. It wasn't much of a challenge, I had it already built in my mind while I explained the process to them :)
Sadly, this photo series was before I really took many pictures of projects, and I seemed to always forget the "before" shot.
Anyway, this should give you an idea of what can be done.
Please note, with salt water and a waterfall running all the time, there is evaporation. This can be a pain if you are manually adjusting your salt levels. Incase of people with electronic salt distributors, its not a biggie.
The stone I used, couldn't be a better match for the retaining wall (Rainbow Ridge). It really blends well
The pool isn't large, and I only had a tight spot between a chain-link fence, and an AllanBloc retaining wall. At the top, is the kids play area, where there is also a small upper-pool. We did install a small retaining wall between the fence and where the waterfall was to go. I needed a nice finished edge for the neighbours to see, and a sturdy support for the feature.
What you don't see, is how I transitioned from the waterfall, over the existing pool deck. I'll let you figure out how I did it and have no leaks marrying the 2 features together OR damaging the pool deck.