A filtration system and filtration unit are disclosed herein. The filtration system can include an aquarium and the filtration unit. The filtration unit can attach to the aquarium. The filtration unit can include a pump that circulates water through the filtration unit and a plurality of chambers. The plurality of chambers of the filtration unit can include a sterilization chamber, a pre-filtration chamber, and a root chamber. The sterilization chamber can include a sterilization feature that sterilizes the water circulating through the filtration unit, the pre-filtration chamber can remove large objects from the water, and the root chamber can contain a root network of a plant.
