QuestionsGarden DesignHard LandscapePaths and Paved AreasAlgae on pebbles 0 Vote Up Vote Down John Gill asked 15 years ago Can you please tell me what I should use to remove algae from pebbles I have along paths and driveway ? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Alage on pebbles is due to a lot of wetness or shading. You can just rake the gravel to keep it more open to the air and light. Using Mosgo or similar has a temporary effect and the results may last only for a few months.