Ceramic Filter Media Bio Filter Rings 0.7lb / 2lb / 4lb / 8lb (4lbs)

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About This 4lbs media rings Rated for 100-200 gal / total 21600 ft surface area, porous internal structure 2 additional XL mesh bags included. Remove ammonia & nitrite, vast surfac e area / porous internal structure results in superior efficiency 100% aquarium safe non-metallic ceramic, will not leach aluminum or any heavy metal Show more