... -4, 4-8, 8-16mm Good quality, Relative comp Natural Zeolite for Water Filtration:Size:0.8-1.5,1-1.8 ... -4, 4-8, 8-16mmGood quality,Relative competitive price Application of Natural Zeolite in filter water:It can purify water turbidity, chroma ... , such as:cadmium, nickel, zinc, mercury, iron ion and organic: phenol, 666 and DDT, three nitrogen, ammonia nitrogen, phosphate root ion exchange ...