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Juwel Bioflow Filter M - High-Capacity Aquarium Cleaner aquarium-systems This is a common contaminantThe Juwel Bioflow Filter M offers an efficient and reliable filtration system with its extra large filter volumes. Specifically designed for aquariums, this filter system supports mechanical, chemical, and biological filtering. The advanced bipolar current principle optimises different flow velocities within the filter, enhancing the performance and lifespan of the system. With easy access to the pump and heater, maintenance is straightforward,