Durable pond pump filter bag built with multilayer reinforcement and fibers to resist tearing during long submersion in varied water environments, providing reliable performance over time. Suitable for aquarium and pond setups, this filter bag helps outdoor fountains run cleanly by blocking impurities and supporting easy water maintenance. Precision woven meshes promote stable water flow by intercepting debris and reducing clogging, helping maintain balanced distribution and clear water. Practical drawstring closure plus a fine mesh screen cover resist clogging and capture even the smallest particles, aiding easy maintenance and extended filter life. Compatibility and function: designed for use with pond pump filtration in both aquariums and ponds, including outdoor fountain applications, to improve filtration efficiency and water quality. Easy to use and maintain: drawstring secures the bag during operation, while the fine mesh screens keep debris out without restricting flow. Use scenarios: Outdoor pond with a pump and fountain: place the filter bag to trap leaves, sediment, and debris, helping maintain clear water and steady fountain performance. Home aquarium filtration: insert the bag to intercept impurities and promote consistent water flow, reducing maintenance frequency. Garden water feature or decorative fountain: use the bag to block debris from entering the pump and filter system, ensuring reliable operation and clearer display water.