Aquarium Bio Media Balls For Canister & Pump Filters - Multiple Sizes Available. Enhance Your Aquarium's Health with Our Premium Fish Tank Filter Media. Designed for Both Freshwater and Saltwater Environments, These Bio Balls Offer Exceptional Biological Filtration by Effectively Removing Harmful Ammonia and Nitrite. Each Ball is Equipped with an Integrated Bio-sponge That Promotes the Growth of Beneficial Bacteria, Maximizing Surface Area for Optimal Filtration. Built for Durability, These Bio Balls Require Minimal Maintenance—just Rinse Them with Aquarium Water. The Included Mesh Media Bags Ensure Easy Handling, and the Variety of Sizes Guarantees a Perfect Fit for Your Tank. Features: - Durability: Reusable and Long-lasting - Optimal Filtration: Effectively Removes Ammonia and Nitrite - Easy Maintenance: Simple Rinsing Process - Versatile Use: Suitable for Both Freshwater and Saltwater Tanks - Size Options: Available in Packs of 10, 20, 40, 50, and 100 - Dimensions: 16mm and 26mm Diameters with Integrated Bio-sponge - Material: Made from High-quality Plastic Choose Our Reliable Bio Balls for a Cleaner, Healthier Aquatic Environment..