We have touched on water flow rates or tank exchange rates and how they affect the amount of oxygen available to your fish or what amount of feed you can apply to a tank full of fish per day assuming there is Aeration somewhere in the system.
Aeration comes in many forms with majority of choices for low density fish stocks are diffusers submerged in the bottom of the fish tank. I will cover some of the basic info that will be helpful when selecting what size air pump, if you need one and the associated air diffuser option in the following post.