Description Are you looking for a professional, yet affordable filter spongefor fish tank and aquarium? Are you in search of a sturdy, trustworthy tool that can do multiple jobs? If yes, look no further! Our filter sponge, made of high-class material, must meet your needs. Features -Material: Sponge -Made of reliable material, it doesnt interfere with your tank's other accessories. -It helps in promoting a thriving habitat for fish. You can enjoy viewing the landscape clearly. -High water penetration efficiency and no water accumulation, convenient to use. -With good water absorption and high permeability, filtering and decomposing dirt. -It is perfect for both freshwater and saltwater aquariums and offers good performance.Package list: 5 x Filter Cores