Miniata, I am a bit confused. Is the pool indoors? Is the climber to cover the front of a seating gallery above the pool?

Don't know about ABOVE a swimming pool, but a golf club I used to go to had a wonderful Clematis growing all around on a trellis in an outside swimming pool, Cannot remember the name of it, but Theres loads that will suit, I'm sure.

I've never grown them, but I'd have thought that citrus espaliers would be a huge amount of work - quite the opposite of low maintenance.

ok.....its a gallery/walkway above the pool....using planters think they want to see vertical greenery spaced the same all way along on both sides....also thinking about chemicals from pool rising with vapour?

the pool is actually underground with the greenhouse (dummy) above with cold frames as windows.....a total waste of glass if u ask me but hey ho!