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Bio Ceramic Rings
|The Cascade Bio Ceramic Rings are a convenient ready-to-use nylon mesh filter bag filled with Ceramic Rings. Surface area and pores sized to accommodate bacteria necessary for biological balance and to remove toxic Ammonia and Nitrite. The Cascade Bio Ceramic Rings produce crystal clear water and is perfect for use in any canister filter, or in any Penn-Plax Cascade Canister Filter.|