Pond Boss Forums POND CONSTRUCTION Creating habitat Best Way to mark Structure

Since all of my present structure comes to within 4 feet of the surface, I mounted a bottom half of a 30 gallon drum as a large flower pot on top of all of my structures and filled it with fertile mud. In some I've planted arrowroot and others lilly pads. Since the plants are rooted in plastic pots suspended at minimum 3 feet off the bottom sediment, I haven't had problems with the plants spreading beyond the pots (2 seasons experience now) and the plants die off in winter to below the ice and they look pretty natural.