8-Layer Non-Gel Filter Pad : This aquarium sponge filter cotton denitrifier accessory features an 8-layer non-gel filter pad, ensuring efficient water filtration and maintaining optimal water quality for your fish tank. Improved 8D Sponge : The improved 8D sponge technology enhances the product's effectiveness, providing superior absorption capabilities and longer lifespan than traditional sponges. Denitifier Functionality : Equipped with denitifier functionality, this product effectively removes harmful nitrates from the water, promoting a healthier environment for your aquatic pets. Versatile Use : Designed for versatile use, this filter pad is suitable for various fish tanks, including freshwater and saltwater aquaria, making it a versatile addition to any fish owner's toolkit. Durable Material : Made from high-quality materials, this aquarium accessory is durable and long-lasting, ensuring reliable performance and value for money. Easy Installation : With its user-friendly design, this filter pad can be easily installed in your fish tank, saving you time and effort in maintaining your aquarium.