your aquaponics system is the most important thing to consider in your aquaponics fish. Fish are the backbone of any aquaponic system. In fact, fish are the power house of your aquaponics system. They provide the necessary nutrients for the plants you choose to grow in your aquaponics and they may provide a good healthy edible food. You will be surprised at the variety of species you can grow in your system. There are a few factors you should take into account when choosing your aquaponics fish: