I saw an Aquaponic system on Doomsday Preppers. Anyone know anything about these?
You have a large tank to raise fish in, the fishes waste is circulated into the hydroponic subsystem to feed vegetables (which filters the water for the fish) and than it's circulated back into the fish tank.
You can raise Talipia, Cod, Catfish, Bluegill, Crayfish, etc...
Looks complicated, but you get tons of great fish and vegetables that are nearly free and a cool project.