Our pool was completely green, no bottom in sight. We were just before draining the water. As a last resort we bought the Algenverhüter and completely pure tilted. The water was only milky and we had to clean the floor several times with a vacuum cleaner. Our sand filter must be backwashed while also repeatedly. After a week and several Saugvorgängen we actually cleared the water.
The water is really crystal clear again.
Absolutely great and much cheaper than all the stuff from the. Hardware store.
