[12 filter environment] These include volcanic rocks, medical stone, zeolite, coral sand, nanometer bacterial rings, infrared bacterial rings, biological beads, bio balls, active carbon, infrared micro spheres, ceramic rings and red respiratory rings. .[ Easily improve water quality] Place the filter material into the fish tank and pond. The product can filter and purify water resources in a multi-faceted way, improve the quality of aquarium water, dissolve purity, balance the pH, naturally clean your water, and grow useful bacteria with these bio-fiber and create a good life environment for fish. .[ Work as a biological filter medium]: Aquarium bio filter is an excellent interaction between air and water and gas exchange. Bio-tops can provide a beautiful nest where they can settle in useful bacteria and feed on water and oxygen. It will also encourage gas exchange and increase dissolved oxygen levels. To create a good ecological cycle. .[ Scientific configuration, rational combination] Mixing ratio of various filtering materials in the product has been calculated. It can also be used in various ways, which not only solves the water quality problem of the fish tank, but also saves you time. .[ Recommendation] Product contains natural ingredients. Please clean before using it. It is to use a fish tank or chlorine - water for cleaning.