These semi-closed ecosystems are quite similar to the natural environment of the animals. In nature there are no food pellets filled with high nutrients and fatty acids and the fish must get there nutrients from that environment. In this symbiotic environment fish feed on the aquatic plants and microorganisms obtaining much of their nutrients. The Plants produce most of the oxygen for the system. Naturally occurring Bacteria breakdown the waste material converting it into available nutrients for the plants.
Snails perform an important role by eating the dead plant material.
This stirring action moves the water and nutrients making them available to the plants and snails. The most common mistake in caring for any aquarium is Over-Feeding. Too much food will cause a bacteria or algae over growth which can upset the balance of your system. Use only 1 small pellet per two fish or shrimp. You may notice some cloudiness shortly after this initial feeding.