This aquaponics system is different than most. It’s a scaled down version of the system Will Allen over at Growing Power Inc uses to grow 1 Million pounds of food on his 3 acre farm in Milwaukee, WI. The whole system uses just a single pump and uses very little energy to pump nutrient rich water up to the gravel bed on top for filtration. The upper bed is slightly angled so the water can slowly drain down to the second bed below. And then finally back into the main tank where the fish are kept.
This system is scalable and will produce a large amount of food in a very small space when compared with traditional row cropping. The tank(s) at Growing Power are some 60 feet long. You can imagine the number of fish you could raise in a 100 foot tank.
This system has almost unlimited potential yield, and scalability. Building one for yourself is relatively simple, and will allow you to grow your own food at home for a fraction of the cost of buying it from your grocery store.
See and learn how to do it yourself here http://www.offgridworld.com/simple-aquaponics-system-for-growing-your-own-food-fish-at-home/