Black Thick Fish Tank Aquarium Sponge Filter Biochemical Cotton Filtration

Description: The Biochemical Filter has the best effect on decomposing the excrement and the forage leftover. Its multi-porous feature will avoid blockages and provide the largest adhesion area for bacteria. The material has great thickness, it is durable. Very suitable for using in freshwater and marine water. Can be cut any sizes as your needed. Lightweight & softness design. Excellent water permeability. Cultivate the nitrifying bacteria for biological filtration. Dense shape makes it effective to avoid residue. Can be used again after cleaning. Color: black Size: (approx.) 50x50x2cm (L*W*H) Material: Cotton Note: Please allow 1-2cm error due to manual measurement. And due to the light and screen difference, the item"s color may be slightly different from the pictures. Please kindly understand. Make sure you don"t mind before you order. Package included: 1x filter biochemical cotton .