This a new one to me but I relly like the idea. It’s has a biomimiced system which is a new topic I haven’t discussed in this blog yet. The problem: commercial swimming pools need a fair amount of cleaning from chemicals so as not to catch any dieseases from the water, the water in the pool also needs draining ever so often (I’m not entirely sure I don’t and never have owned my own swimming pool, but what my red eyes tell me from being in public ones is that something in there is trying to kill something if not my eyesight). In nature natural systems will clean the water, like the moment of the stream or passing through rocks that filter the water and plants that will consume the other things floating in the water. It will still need maintence because it is still a closed loop of water (we can’t all have our own still river rockpool in out backgardens).