Prodac’s Medium Filter Media Mesh is an effective solution for housing filter media in external aquarium filters, measuring 19×9 cm. This medium density mesh is perfect for effectively retaining particles and debris, providing balanced filtration that improves water clarity and quality without restricting flow. Its versatile and durable design ensures that it stays in place and works efficiently, significantly contributing to the health and well-being of the aquatic ecosystem. Ideal for aquarists looking for efficient and easy maintenance of their filtration systems.