Description
24Pcs 6.5 Inch Long Large Aquarium Ceramic Filter Media,Ceramic Bio Media Blocks for Fish Tank and Koi Pond The aquarium filter media is made of with porous ore, rich minerals and fine porous volcanic ash refined. Ceramic media covered with thousands of porous tiny holes provides large surface area. Highly porous ceramic material produces both mechanical and filtration, Balance PH value and adsorb impurities
