Aquarium Biochemical Filter Sponge

Essential biological filtration for a healthy aquarium, this 3cm thick sponge helps stabilize water quality and supports beneficial bacteria growth. High porosity design for excellent water flow and oxygenation Promotes colonization of nitrifying bacteria to maintain a stable nitrogen cycle Soft, durable foam that is gentle on fish and easy to handle Compresses for convenient storage and expands fully when submerged in water Simple to maintain: rinse gently with tank water during routine cleanin