Where can I find Heavy duty detergent powder in Marl?

Heavy duty detergent powder can also be found in these cities:

Bochum Bottrop Castrop-Rauxel Datteln Dorsten Dortmund Gelsenkirchen Gladbeck Haltern am See Herne Herten Oberhausen Obertaufkirchen Oer-Erkenschwick Raesfeld Recklinghausen Schermbeck Waltrop

You can also find this in Marl:

Spelt Bread Sunflower Oil Mustard Candies Hair Heat Protection Dental Care Razor Blades Eye Cosmetics Contact Lenses Dextrose