As an end-game power source, this could work. Current generators would have to be used in the design, since the natural water currents won't be strong enough to power a generator. It would have to be expensive and big, though. And someone will have …
What are we going to do with the translations for water bottles? Converting OZ to Liters doesn't really work. But using OZ in the Dutch translations is also sub-optimal.
Just use Liters and make up some sensible amounts?