A multi-layered aquaponics system used for cultivation has a fish tank, at least one layer of a grow bed adapted to support growth of at least one variety of plant in a direction substantially vertical to a plane of a backing element of the layer, a growth light system having at least one LED growth-light fixture disposed above the grow bed, a water supply system having a water circulation loop, and an aeration system without a power source. The aeration system includes a standpipe inside the layers of grow beds and a plurality of bell siphons positioned within the standpipe and connected to a water drainpipe.
