The German volcano city Gedern, idyllically situated at the southwest hillside of the "Vogelberg", offers residents and visitors a wide range of leisure time facilities. This includes the city indoor swimming pool as well. Built in the seventies as a functional training pool, it has lost more and more its attractiveness and acceptance over the years. Consequently, visitor numbers declined steadily, not least because of the high competition by more attractive leisure and adventure pools in the environment. So the Gedern municipality decided to refurbish the indoor swimming pool from the scratch, and assigned that task to the Alfred Möller architects of Bad Nauheim. In close cooperation with tiling company Möller, PCI application engineer Ingo Grollmisch developed the restructuring plan for tiling the pool edge, the walls as well as the showers and toilet areas. The sound pool body was kept.