From the Fluval range, this Replacement Media Value Pack is designed specifically for Fluval U4 internal filters, providing up to 6 months of clear, healthy water. Each pack includes 1 x 55g BioMax for maintaining a healthy nitrogen cycle and supporting beneficial bacteria, 2 x Bio-Foam inserts to trap waste and debris while promoting bacterial growth, and 6 x Poly-Carb cartridges with dual-action polyester and carbon layers to remove fine debris, toxins, odours, and discolouration. Offering a balance of biological, mechanical, and chemical filtration, this set ensures your aquarium stays clean and stable in both freshwater and saltwater setups. For best results, never replace all filter inserts at once to maintain beneficial bacteria.
