We build less formal natural swimming pools, but I love them all. Our natural swimming pools have are environmental systems that use no chlorine. definitely for the nature lovers that enjoy swimming in the garden.
you could add some fish to your water reclamation tank for a small aquaponics system. Grow a few plants to feed the fish and this forms a closed system. There is no need to fertilize, the fish do it for you! Permaculture at its finest!