There are frequently showers – occasionally mandatory – in advance of and/or just after swimming. There tend to be also lifeguards to make sure the protection of users. In locations which attain freezing temperature, it is necessary to shut a pool properly. This differs considerably between in-ground and over-floor pools. https://pool.net/stahlwandbecken-5-25-x-3-20-x-1-50-m-komplettset.html