5Pcs 50x12x2cm Black Aquarium Biochemical Cotton Filter Foam Fish Tank Sponge Pads

Specifications: Color: Black Material: Biochemical Cotton Hole: Micropore(#1) Mesopore(#2) Macropore(#3) Size: (L)X(W)X(H) 50X12X2cm/19.69''X4.72''X0.79''(appr.) Features 1. Excellent water permeability. 2. Can be used again after cleaning. 3. Can be cut any sizes as your needed. 4. Suitable for using in freshwater and marine water. 5. Cultivate the nitrifying bacteria for biological filtration. 6. Offers good biochemical and physical filtration effects. Micropore: It can be used in dense, medium and big holes. It is suitable for fish tank and fish pond filtration. Mainly used for physical filtration and biochemical filtration. Mesopore: It is suitable for fish tank and fish pond filtration. Mainly used for physical filtration and biochemical filtration. Use collocation to achieve better effects: fish tank with cotton wool, fish pond with vine cotton. Macropore: It is suitable for fish tank and fish pond filtration. Mainly used for physical filtration and biochemical filtration. Especially suitable for the primary filtration environment with dirty water quality. Use collocation to achieve better effects: fish tank with cotton wool, fish pond with vine cotton. Package included: 5 x Filter Sponge