Aquaponics is such a great idea. The fish and vegetables lived in a closed system, which means the water is basically reused over and over. Fish supply nutrients to plants and plants do the same. The space required is minimal, too. At least compared to conventional fish farming and field-raised vegetables.
With both land and water at a premium now and in coming years, aquaponics is definitely something to look into. The University of Hawaii has been experimenting with fish and plant combinations and equipment for the best outcome. For do-it-yourselfers, look at these six ideas for aquaponics systems.