Genuine Fluval spare part. Exclusively designed for Fluval aquarium canister filters. These are genuine Bio Foams for the Fluval 04, 05 and 06 External Filters. In addition, its intricate network of pores provides a large surface area that encourages the growth of helpful nitrifying bacteria, which is crucial for efficient biological filtration and goes a long way in creating clear and healthy water for fish and plants to thrive.
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