Fluval Bio-FX 5L

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Available in 2 packaging formats and 2 nugget sizes, BIO-FX is a premium biological media ideal for use with all filter types. Featuring a complex porous structure with deep interc onnected micro-tunnels, BIO-FX provides vast surface areas where billions of beneficial nitrifying bacteria can easily establish themselves and thrive to foster a healthier aquatic environment. Show more