Fluval U4 Poly-Max Cartridge

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Fluval’s Poly-Max Cartridge is a 2 in 1 media which absorbs excess Phosphates and Nitrates to reduce unsightly algae. Poly-Max provides the chemical stage in the filtration process which is beneficial in controlling unsightly algae using ion exchange resin secured between polyester floss. The U4 Poly-Max Cartridge is specifically designed to fit the U4 Internal Filter, it’s advisable to replace the Poly-Max Cartridge every 2-4 weeks to ensure optimum filtration is maintained. At a Glance 2 Duel Cartridges per pack Designed for the Fluval U4 Internal Filter Chemical Filtration Absorbs Nitrates and Phosphates Suitable for Freshwater and Marine Advisable to replace every 2 – 4 weeks Show more