Methods of covering a horizontally orientated substantially cylindrical propane tank supported on a surface, with the propane tank having a longest dimension parallel to the surface. One method comprises providing a cover having at least one closure mechanism, surrounding the propane tank with the cover, and closing the closure mechanism, wherein the cover can only be removed from the propane tank by opening the closure mechanism. Another method comprises providing a cover comprising a covering portion and a skirt extending downwardly from the covering portion, positioning the covering portion of the cover over the horizontally orientated cylindrical propane tank, and vertically hanging the skirt from the covering portion.