Juwel Nitrax is a specialized filter sponge designed for aquarium filtration systems, specifically targeting nitrate removal. This large size (L) filter pad is compatible with Juwel Bioflow 6.0 Standard/H filter systems and helps maintain optimal water quality. Key features: • Effectively removes nitrates from aquarium water • Compatible with Juwel Bioflow 6.0 Standard/H filters • Large size (L) filter pad • Green sponge material with porous structure • Part of Juwel's comprehensive filter system The Nitrax filter pad is made from a specialized porous sponge material that provides optimal surface area for beneficial bacteria that help break down nitrates in aquarium water. Regular replacement of this filter media helps maintain proper water parameters and prevents nitrate buildup which can be harmful to aquatic life. The pad is easy to install and maintain as part of routine aquarium maintenance.