After seven years: "It's just great! We don't have any kind of sludge like we had before. (We had kind of a black sludge pile....and we had standing water.) Anyway, we don't have that problem anymore!. .... I would suggest trying [EarthBuster] because I believe it potentially saved us a lot of money [over] having to put in a new septic system to try to remedy this. And now we can mow our lawn and not have to go through black sewer sludge!"