Expensive - but it works

We use these algae annihilator for about 3 years and have not found anything better. Our water is crystal clear and you can always see to the bottom. As our pond abbekommt much sun we used morning and evening away algae with the Nets in the summer every day. What neither we, nor the pond inhabitants, has the water lilies like. Now we use the String Algae regularly, depending on the sunlight weekly or every 2 - 3 weeks and have only a few filamentous algae which are pleasant for the pond and its inhabitants. We only native fish, dragonfly larvae, diving beetles and newts in the pond. Other cheaper products have been tried but have never brought immermal so a good result.