XINYOU Super Biochemical Sponge Filter XY-2835 For Aquarium by Crown Aquatics

This versatile internal filter offers a dual-action solution for small aquariums and fish bowls by combining effective water purification with essential oxygen enrichment. To operate, the unit is connected to an air pump using a standard air pipe, creating a gentle current that draws water through the dense filter sponge to capture floating particles and waste. As the air bubbles rise through the center of the unit, they break the water surface to facilitate gas exchange, ensuring your fish have a constant supply of fresh oxygen. This low-maintenance filtration method is ideal for maintaining a stable ecosystem, as it provides a safe, gentle flow that is perfect for delicate species while keeping the water crystal clear.