Invest in the health of your aquarium with our advanced filter system. The 3-in-1 functionality supports oxygenation, water circulation, and silent operation, creating an ideal habitat for your fish. The replaceable sponge design offers convenience and durability, making it a valuable addition to your aquarium maintenance routine. Features -Color:Black -Material:Sponge -Size:7.60X4.80X4.80cm/2.99X1.89X1.89in -Multifunctional filtration: integrates aeration, water circulation, and filtration to create an optimal aquatic habitat -Silent running: designed to operate quietly, ensuring it won't interfere with your daily life or sleep -Continuous oxygenation: provides a steady supply of oxygen, keeping the water fresh and clean for your fish -Simple sponge replacement: easy to replace and clean, ensuring the filter remains effective over time -Versatile use: suitable for a wide range of aquariums, providing a comfortable and healthy environment for your aquatic pets Package list: 16 x Aquarium Filter Sponge