Compatible with 7137710 and 7209410 filter units. This filter sponge roll provides efficient filtration as a replacement media for compatible filters. It helps keep water clear by capturing debris while allowing steady water flow, supporting the performance of your filtration system. Key benefits Efficient filtration: density sponge traps suspended particles and debris, improving water clarity. Quick maintenance: easy to install as a replacement media to restore filter performance. Durable design: maintains form and filtration efficiency through regular rinsing and replacement cycles. Broad applicability: suitable for fish enthusiasts and professional aquarists, including home displays and multitank setups. Use scenarios Routine media replacement in a home aquarium with 7137710 or 7209410 filters to sustain stable water quality. Replacement media in professional displays or show tanks where reliable filtration is essential. Interim filtration for quarantine or hospital tanks during treatment periods to maintain water quality.