Aquarium Filter 1000gram Media Natural Coral Bone Biological Filter for Fish Tank Aquarium Accessories

1000g Natural Coral Bone Biochemical Ball Filter Media Nitrifying Bacteria House Aquarium Filter Accessories For Fish Tank Water Cleaning Features:1, From natural Coral Bone2, Full of rich variety of natural elements and essential minerals and trace elements.3, PH Neutral. Great help to restore the natural water quality, and provide the most suitable living environment for your fishes.4, Won't dirt water, absorb ammonia, and other toxic substances in water.5, Porous will be good for Microbial reproduction.6, Long life time. The little holes are not easy to be blocked.Specification: Material: Natural Coral BoneColor: Natural Coral BoneDiameter: about 1-3cmColor: Light yellowIncluding: 100g/250g/500g/1000g Bio Balls Filter Media Coral Bone Aquarium Filter