1、Quality Sponge: Aquarium filter sponge is made of high grade sponge, good filtration effect, safe and non toxic, does not affect the quality of water PH, suitable for freshwater and saltwater. 2、Efficient Filtration: The filter sponge helps to catch particles and debris in the water, prolong the life of the filter media, provide efficient water flux, reduce clogging, and achieve long lasting filtration. 3、Safe and Reliable: Fish tank filter sponge roll is suitable for a variety of aquarium environments, and young fish and shrimp do not have to worry about being inhaled, providing a safe environment for them. 4、Keep Clean: Compact and easy to carry, this replacement filter sponge roll is an important part of keeping your aquarium water clean and creating a great environment for your fish. 5、Scope of Application: This filter foam sponge roll is suitable for all shrimp tank owners and anyone who has small fish in their tank, providing them with a clean environment.