Item Name: Plastic Fish Tank Filter Media Wet/Dry Biological Sponge Aquarium Bio Balls. Material: Plastic Aquarium Pond BallsBIO-Balls do not require replacement unless damaged or destroyedEach filter media is pre-packed in its own mesh media bag.The bio balls provide biological filtration, removing toxic ammonia and nitrite.Dimensions: Diameter of bio ball: 16mm (included biological cotton)Great for fresh or saltwater aquarium filtration systems.Can be reused over and over again until it breaksIn the event of excessive buildup, you may gently rinse with water from an established aquarium, if desiredThe bio-sponge inside provide more surface area for growth of beneficial Bio-Spira bacteria100% Brand new and high qualityColor: BlackPractical and durable home using productPackage:50 PCS*Aquarium Bio Balls *
