18OZ Aquarium Filter Mixed Ceramic Balls Media, Fish Tank Water Filtration Pond Filter Ceramic Rings Volcanic Rock for Water Quality Improve, PH Adjust

【Scientific water cycle】:Aquarium bio-filter is excellent interaction between air and water and gas exchange. Bio-balls media provide a home for beneficial media where they can promote gas exchange and increase dissolved oxygen levels and form a good water cycle. 【Application】:Suitable for all kinds of aquarium filter and fish tank sump,pond filter Canister such as Hang on back filter,top filter and aquarium bottom filter etc. 【Multifunction】:Filter materials helps increase oxygen, adjusting pH, Promote fish metabolism,releasing and absorbing trace elements, effectively water quality improvement,Suitable for Saltwater and freshwater environments. 【Provide Health environments】:filtering medium provide an anaerobic environment, reducing the content of nitrates in water,Stabilize PH,cultivate beneficial-media with bio-balls and clarify your water naturally. Included Quartz rings, volcanic rocks, medical-stone, coral sand, Ceramic-rings, infrared media-rings, bio-beads, bio-ball, infrared-microspheres, ceramic rings and red breathing rings.