I spread around 20 pounds of infill over an area of 100 feet of artificial turf. Perhaps I used a bit more than needed because you can notice the fill, from angles. It doesn't bother me much as I no longer detect any dog urine odor. Since I had already applied infill before I simply sprinkled this material on top. Used a broom and hose to blend it in. Additionally I apply a deodorizer enzyme every two weeks. Far this method has been effective for, over a month; hopefully it will continue to work for the next couple of years.