Aquanature Aquarium Mech Ceramic Ring Porus White Bio Ceramic Filter Media-10 kg Undergravel Aquarium Filter(Biological Filtration for Salt Water and Fresh Water)
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Aquarium ceramic rings have precise structures full of holes,adhere to which are a lot of good vital bacterium such as nitro-bacterium supplied to grow accompanying aquatic livings,also with good adsorption,improved the effect of biological filter and keep water stabilized.
