The Eheim Synth Phenol-Free Fine Filter Medium is a high-quality, completely neutral filter wool designed for saltwater reef aquariums. This advanced fine filter medium effectively traps even the tiniest particles of dirt, ensuring exceptionally clear and pristine water in your display tank. It serves as a crucial final polishing stage in your filtration system.

Engineered with a special phenol-free structure, this filter medium prevents the release of harmful substances into your sensitive reef environment, making it safe for all corals and invertebrates. It is typically utilized as a thin pad, positioned as the very last layer before the water outlet in your external or internal filter setup. For optimal performance and water quality, it is recommended to replace this medium after each filter cleaning.

This 2-liter package is ideal for reef aquarists seeking to achieve crystal-clear water and maintain a healthy environment for their delicate inhabitants. Its ability to meticulously remove fine particulate matter significantly enhances water clarity, reduces organic waste, and contributes to the overall well-being of your reef system. It is an essential component for anyone aiming for superior water quality and a visually stunning aquarium.