Upgrade your filtration setup with the Oceanmax Bio Balls Filter Media 1kg box. These small, high-surface-area bio balls are designed to fit most filtration systems, promoting extensive bacterial growth for efficient breakdown of waste and improved water quality. Perfect for both ponds and aquariums, these bio balls require minimal maintenance and are suitable for creating a healthy, balanced aquatic environment. Available in 6-8mm and 8-10mm — pick your size above.