Ciano Bio-Bacteria Cartridge XLarge delivers superior biological filtration for aquarium ecosystems. This precision-engineered cartridge integrates seamlessly with CFBIO XL filters, efficiently breaking down harmful waste compounds that compromise fish and coral health. Measuring 9.8 x 8.0 x 3.3 cm, each unit establishes optimal bacterial colonies that enhance water clarity and promote vibrant aquatic life. With a 140-day operational lifespan, these cartridges support improved developmental growth and vitality in aquarium inhabitants through consistent biological filtration. The simple replacement design ensures uninterrupted water quality management for serious aquarists seeking professional-grade filtration solutions.