The AQUASONIC NT4 is a very powerful algae killer that is also able to remove the biofilm of walls and stones
so that fungus and bacteria can't reproduce.
It is capable under certain circumstances to keep ponds of 150 meter free.
When but the algae pollution is extreme or there are obstacles like plants or little islands or when the water is shallow the distance has to be estimated shorter.
The device is not harmful for fish and breed.
Power consumption: 40 Watt.