Aquaponics is the combination of aquaculture (raising fish) and hydroponics (the soil-less growing of plants) that grows fish and plants together in one integrated system. hydroponics is a method of growing plants without using soil (i.e., soil-less).. There are five main inputs to the aquaponic system. these are water, light, feed given to fish and other aquatic animals, electricity to pump and filter water, and of course, oxygen. once the fishes are placed in the tank, the cycle begins. feed is given to fish and other aquatic animals to make them grow healthily..