Photo 1 of ALEGI 6 lbs Aquarium Ceramic Bio Filter Media Sphere for Freshwater Aquarium and Marine Fish Tank Sump, Canister Filter, Koi Ponds

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Photo 1 of ALEGI 6 lbs Aquarium Ceramic Bio Filter Media Sphere for Freshwater Aquarium and Marine Fish Tank Sump, Canister Filter, Koi Ponds