If you notice that the pool is sinking and the ends are rising, it is necessary to inflate the air bladder. This operation must be done every 2 or 3 months (depending on use and weather conditions). It is completed when air bubbles escape from the holes. Always add air to the tubes until it escapes through the holes before putting water back into the pool. For Winky and Ovline pools, the liner should never be filled with water only, as this could cause the fabric to tear (too much mechanical stress). However, you can reduce the difference in height of the liner by reducing the air pressure in the liner. For more information, do not hesitate to contact us.