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Fluval BIOMAX for U2/U3/U4 Underwater Filter, 3.88 oz / 110 g

Prices updated 19 May 2026

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Product Description

Specifically designed for the Fluval U2/U3/U4 filters, BIOMAX provides an optimal environment for the colonization and growth of beneficial bacteria.. Features. Biological filter media. Complex pore system provides large surface area for beneficial bacteria. Reduces and controls ammonia and nitrate. Suitable for freshwater, saltwater or reptile environments