YEE Upgraded 8D Multi Layer Reusable Aquarium and Koi Pond Filter Media Sponge for Cyrstal Clear Water | No Clog | Washable | Long Lasting (50 * 11 CM)

Use It to Fish Tank Without Changing Water Suitable for a variety of filtration systems, fish tank bottom filter, fish tank top filter, external filter bucket, water curtain filter box, wall-mounted filter box, fish pond filter, etc. 3D Honeycomb Hole Glue-free, multi-layer culture, scrub resistance Over 200 washes will not rot. Using bio materials, no glue, adhesive, no peculiar smell, no harm to fish. Good water permeability, no clogging, and anti-overflow. 8-layer Water Purification Design 3D Honeycomb Mesh Cloth Stereo Hydrophobic Fiber Layer Precision Carbon Fiber Cotton Glue-free Nano Biochemical Cottor Fiber Biochemical Cotton Precision Carbon Fiber Cotton Stereo Hydrophobic Fiber Layer 3D Honeycomb Mesh Cloth