this is pretty much exactly how we are builing our retirement home in SC. Only it will be a little deeper but all spaced will be completely open to the windows in the front creating bay-like sections in the home for different rooms.
It would be cool to encase aliens without contaminating the water somehow. Fiberglass water storage tube tanks for passive solar heating & cooling system Trombe walls. Prevent temperature swings in greenhouse or sunroom by storing excess solar energy.