Aquarium Reusable 8-layer Sponge Filter Pad - Foam For Fish Tank & Pond -. Product Description Enhance Your Aquarium's Water Quality with Our Advanced 8-layer Filter Pad, Crafted for Superior Filtration Performance. The Cutting-edge 3-dimensional Mesh Efficiently Captures Larger Particles, While the Ultra-high Precision Cloth Targets Finer Debris. Featuring Layers of Activated Carbon Cotton, Nano Bio Sponge, and Fiber Bio Sponge, This Filter Excels in Removing Even the Smallest Impurities and Germs. Its Robust Design Allows for Easy Cleaning and Multiple Reuses. Perfectly Suited for Both Freshwater and Saltwater Environments, This Versatile Filter Floss is Ideal for a Range of Setups, Including Fish Tanks, Pre-filters for Wet/dry Systems, Sewage Tanks, Reef Tanks, Ponds, and Fish-vegetable Symbiosis Systems. Summary of Features: - 8-layer Thickened Design - 3D Mesh and Ultra-precision Cloth for Efficient Particle Trapping - Layers Include Activated Carbon, Nano Bio Sponge, and Fiber Bio Sponge - Easy to Clean and Reusable - Suitable for Freshwater and Saltwater Environments - Compatible with Various Aquarium Systems.