The concept is simple. Water, containers, plants and fish come together in a symbiotic relationship and environment. Aquaponics has been around for centuries in one form or another. From what I can gather, the Aztecs were some of the first people known to be involved with this type of system, using their chinampas - or floating gardens - to feed their enormous population. Their system may not be what we call aquaponics today, but the basic principles are the same: plants thriving from nutrient-rich water.
Understand the ins and outs of aquaponics