Patio Deep CleanTM by All for Stone is a fast-acting and effective cleaner designed to remove black spot algae and green algae.

It will also treat most organic, coloured food staining such as tea, wine, coffee, cola, iced lollies etc, and is suitable for organic staining from birds, berries, leaves, trees, bark, wood, seed, pods and flowers.

For persistent black spots, several applications may be required.