Aquarium Sponge Filter Quiet Double Submersible Foam Filter for and Fish

PRACTICAL TOOL: Aquarium sponge filter solves the problem of frequent water changes, cloudy water, yellowing and greening, and fish deaths. UNIQUE DESIGN: Sponge filter has a multi layered design with a large area and no obstruction to water . PRODUCE BUBBLES: The fish sponge filter s diffusing stones produce large amounts of bubbles, increasing the dissolution of oxygen in the water. Item Type: Aquarium Sponge Filter Material: Plastic, Cotton