OASE Ceramic filter media
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The Ceramic Filter Media for the FiltoSmart 60, 100, 200, or 300 includes a replacement ceramic filter media allotment. Filter media is ideal for beneficial bacteria to colonize as an additional stage of filtration. The allotment contains 14.8 oz of ceramic filter media. It is best to only replace the ceramic filter media when you do a complete tank restart as to not disturb the beneficial biological load.