This filter pad is made of for durable and practical use. It can be used in seawater tank, fresh water tank, aqua-plant tank. And its strong filter ability and high density design can stable water quality and reduce fish died. It is suitable for water bodies with many muddy impurities. Suitable for small flow circulation system. Features - Color: Blue, Green - Material: Sponge - Size: 90.00X30.00X2.00cm/35.37X11.79X0.79inch. - The use of environmentally friendly materials, super toughness and resistance to pressure. - High water permeable feature and filter effectively, not easy to deform. - Great fish tank and aquarium filter sponge and give the fish fresh environment. - Can remove excessive food, fish debris in your aquarium’s water and fish tank effectively. - Make it a habit to replace it regularly so that these things won't cause any problems for a clean living environment. Package list: 2 x filter sponges