Features: Achieve clear water with our highly efficient fish tanks filter sponge! Made from advanced protein ultrafiltration cotton, it effectively purifies and cleanses your aquariums water. Our filter sponge boasts a multilayered design that ensures thorough filtration and strong bacteria cultivation. The mesh structure allows for high water permeability and excellent absorption of impurities. Which is washableand durable. Perfect for all fish enthusiasts, our filter sponge is suitable for both freshwater and saltwater aquariums. Its great for those who want to provide their aquaticpets with a clean and healthy environment. Whether you have a small or large fish tanks, our filter sponge fit perfectly and can be easily cut to size Its perfect for aquariumsowners who want to maintain a pristines and healthy aquaticenvironment. With our filter sponge, you will never have to worry about or dirty water again! Enjoy clear water and a healthy environment for your fish and aquaticplants. Specifications: Product Dimension: Approx. Style A 50x11x4cm/19.68x4.33x1.57inch, StyleB 40x30x4cm/15.75x11.81x1.57inch Material: Sponge Style Option: Style A/StyleB Package Includes: 1x Aquariums Filter Sponge note: Please allow 1~2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.