Tetratec CR Ceramic Rings
Filter media for TetraTec EX range and other external filters. Reliably removes large particles from aquarium.
Hollow ceramic rings with high internal surface area
Mechanically removes large particles from aquarium water
Distributes flow evenly through external filter
Rinse with lukewarm water before use. Can be reused several times, wash in lukewarm tap water to clean.
Suitable for all external filters.