Bought this hopeing that it did the trick on our Block paving, They were surrounded with Moss and green from all the tree residue around us, had spent previous times on my hands and knees scrapping it all out, so many hours it doesnt bare thinking about, always with a bad back and sore knees after "ouch" Well it has been the best £40 i have ever spent, They have all come up as Brand New. It removed every trace of Moss, all the green slime. It was kind of like hoovering really light, very easy to use, Very effective. worth every penny!!!! NO MORE Bad backs for me
