General description Made of ultra-dense thick cotton, this aquarium sponge filter media offers excellent water absorption and high permeability, effectively filtering and decomposing dirt. The filter cotton is designed to be both hard and soft to the touch, allowing for repeated washing and durability. It can be cut into any size according to your needs, making it easy to use in various applications, including seawater, freshwater, and aquatic plant tanks. Technical specifications Dimensions: 4m x 8cm Material: Ultra-dense thick cotton Usage Suitable for seawater and freshwater aquariums Can be used in aquatic plant tanks Powerful filtration ability, reusable after cleaning