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!
Build a backyard fish farm in an afternoon.I am going to try this to raise bait minnows for fishing and maybe a treat for the chickens, they love to eat the fish heads ans so they probably would like minnows, too!