NEZO's high-quality 1-inch Diameter Bio Balls, the ultimate solution for superior filtration in aquariums and ponds. Each Box: Total 2mesh bags /box, 2.7lbs Per/bag.The net bag design makes it easier to store and replace the bio balls as needed. The porous structure of our bio balls provides an extensive surface area, enabling the cultivation of a larger population of nitrifying bacteria. These beneficial bacteria play a crucial role in breaking down harmful ammonia and nitrite, ensuring a healthier environment for your aquatic pets.Not only do our bio balls excel in biological filtration, but they also contribute to enhanced dissolved oxygen levels. By promoting water circulation and aeration, they help to maintain optimal oxygen levels crucial for the well-being of your aquatic inhabitants. Versatility is a key feature of our bio balls. Whether you're setting up an aquarium filter, freshwater fish tank, marine fish tank, or koi pond, our filtering bio balls are the ideal choice for achieving exceptional filtration and creating a thriving aquatic ecosystem. Installing bio balls is quick and easy. Simply place them in your filtration system or pond filter, and let them work their magic. Their compact 1-inch size ensures compatibility with a wide range of filters, making them suitable for various setups. Choose NEZO for reliable, high-quality bio balls that deliver exceptional filtration performance. Create a cleaner, healthier aquatic environment for your beloved fish and enjoy the beauty of a thriving underwater ecosystem.