You prevent coatings by cleaning your waterline from time to time.
Handling: Depending on the degree of dirt, use detergent concentrated or diluted 1:1. Use a soft sponge or cloth. Some stains can be treated more than others. Use only detergents suitable for swimming pools.
Vacuum cleaning
Attach the vacuum head to the telescopic handle and attach the vacuum hose to the vacuum head.
Place the vacuum head on the bottom of the pool and feed the vacuum hose down under the surface of the water until the hose is filled with water and emptied of air.
Bring the other end of the hose to the skimmer. Fix the Skimvac over the filter basket and connect the vacuum hose.
If the suction at the vacuum head gets weaker, empty the skimmer filter basket. If the pool is very dirty, you may also need to empty the filter basket in the pump and backwash the filter.
After finished vacuum cleaning, switch off the pump and disconnect the Skimvac from the filter basket. Backwash the filter.