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!
Top 10 aquaponics vegetables list every body should know “Break-Through Organic Gardening Secret Grows You Up To 10 Times The Plants, In Half The Time, With Healthier Plants, While the "Fish" Do All the Work.
Green Wall Style Aquaponics Source Ikea Shelf Aquaponics Source Classic IBC Tote Aquaponics Source Here& a short DIY article on building your own IBC Tote aquaponics like this. Classic Wooden Aquaponics with NFT Source Converted Gutters Source
How To DIY Aquaponics - The How To DIY Guide on Building Your Very Own Aquaponic System