Unlike typical tabletop saltwater aquariums with ineffective filtration, this superior aquarium filters the water 5X more often to maintain a clean, oxygenated environment. A silent filtration system circulates the 3-gallon aquarium’s water through a carbon-infused, fine mesh filter 20 times every hour, removing impurities, excess food, and waste.The included air pump automatically provides proper aeration to foster a sustainable saltwater environment for yellowtail damsel, firefish, or other small fish.