Heres a great summary of how aquaponics works!
src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmgMnfF0nVfzUGx8evgT8Sq4i-KGdd0_JuW5TIji1YlC9eIqwSs8fZewHjCqOoVRZgnxujCRv9zQW2Msb8Z5UxvOUaVXBwnH7VEGBQgewRnMOoKmBdmxvf9LGXLNjEIzRQlfCCAl7_hpLR/s1600/aquward5ditheredFinal.jpg">
Morgan Kauphusman/MEDILL
Illustrations/Kevin Kauphusman
Sources: Jesse Blom, Sweet Water Foundation; Bowen Dornbrook, Central Greens Commercial Aquaponics