Pull-out Bathroom Storage Behind The Shower Plumbing Wall: Storage and easy access to the plumbing when you need it! This is much better than the narrow/deep closet I have in the bathroom. This way, everything is easy to see and access.
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!