A couple questions from a dad:
Is it solid hard plastic that won't bend or is it soft enough to bend? The reason is if you child leans on the side and it collapses, (s)he could not only go ass over tea kettle but flip off the balcony too. It only takes a second even with you by their side
How high are you? And how child proof is the fencing? Not trying to be critical, only drawing attention in case it has been overlooked.
And, how do you plan to drain the pool? In our backyard, the grass liked the water. Not sure it dumping it over the side might be too Chinesy.
Also, in the backyard with a garden hose, its easy to wash and rinse the algae off. Again, where and how are you planning to do it?
Hope I helped