Specification:
Material: Polyurethane
Color: Black
Hole: Middle Hole, Big Hole, Extra Big Hole
Size: (L)X(W)X(H) 50X50X2cm/19.69''X19.69''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.

Middle Hole(#1):
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.

Big Hole(#2):
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.

Extra Big Hole(#3):
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:
1 x Filter Sponge