Juwel Nitrax Compact Nitrate Sponge for Bioflow Filters. The sponge is designed to reduce nitrate levels in the aquarium. This in turn helps reduce the amount of algae and helps provide a more healthy aquarium for your fish and plants. Nitrax is also a biological filter containing specialist microorganisms to break down poisonous metabolites in the aquarium. It's recommended to change the Nitrax sponge every 2 months for optimum performance.
Medium: Suitable for Juwel Rio 125, Rio 180, Rio 240, Vision 180, Trigon 190, Lido 120 & 200.
Large: Suitable for Juwel Rio 300/350 & Vision 260
Extra Large: Suitable for Juwel Rio 400/450, Vision 450 & Trigon 350.