12 Filter Media Types include volcanic rocks, medical stone, zeolite, coral sand, nanometer bacterial rings, infrared bacterial rings, biological beads, bio-balls, activated carbon, infrared micro-spheres, ceramic rings, and red respiration rings. Why you need this product - Easily improve water quality: Place the filter media in your fish tank or pond. The media filter and purify water in multiple ways, improving water quality, dissolving impurities, balancing pH, naturally cleansing the water, and fostering beneficial bacteria with the bio-balls to create a healthier home for fish. - Support a biological filtration environment: The media provide a conducive home for beneficial bacteria to colonize, feeding on water and oxygen. This arrangement promotes gas exchange and helps raise dissolved oxygen levels to support a stable ecological cycle. Scientifically designed and versatile - The mix of filtration materials is scientifically calculated for effective performance. It can be used in multiple configurations, helping to address aquarium water quality issues and saving you time during setup and maintenance. Usage and care - Note: The product contains natural ingredients. Please rinse before use. For rinsing, use aquarium water or dechlorinated water. Usage scenarios - New tank setup or cycling: Helps establish beneficial bacteria quickly, supporting a healthy nitrogen cycle from the start. - Pond filtration: Suitable for garden ponds, improving clarity and reducing organic impurities for a balanced aquatic environment. - Ongoing filtration improvement: Integrates with existing filtration systems to enhance water quality and reduce maintenance effort over time.