Biochemical sponge for aquariums, aquarium filtration accessories, ultra-quiet

Biochemical sponge: Made from food-grade materials, it is completely safe and easy to clean. Suitable for aquariums with a capacity of 75 liters. This sponge ensures excellent biofiltration, quiet operation, and good water circulation. Dimensions: 4.8 cm deep x 7.8 cm high, inner diameter: 1.5 cm. This replacement sponge is ideal for sponge filters. It improves biocapacity, reduces maintenance, increases oxygen levels, and provides optimal living conditions for beneficial bacteria, resulting in healthy water. Great biochemical sponge for ornamental fish, fry, goldfish, shrimp, small fish, and breeding aquariums. Recommendation: Replace every 5 to 6 months. Quantity: 4 pieces.