Inert ceramic rings trap large particles before they can clog the finer sieves of the modules above. The surface of the rings support large populations of beneficial bacteria. Pre-Filter Media is permanent and requires only occasional rinsing.
Directions: Place Fluval Pre-Filter Media in the bottom filter module of your Fluval Filter. Rinse to remove dust and foreign matter. Reassemble module stack and insert into filter case. Close and seal filter. Fluval Pre-Filter may be reused after rinsing in hot water. Alternate the changing or cleaning of filter media in your filter case in order to maintain continuous biological activity within the filter.
Fluval External Power Filter Pre-Filter Media
Size: 750 g