The special formulation of various natural minerals, stone flour, clinoptilolite and sodium and magnesium sulfate creates a biological balance in the water which is much more competitive with filamentous algae. This helps the dirt-breaking bacteria reduce excess nutrients in the water. Filamentous algae can no longer meet their nutrient requirements during the growth phase. The more filamentous algae there is in the pond, the greater the competition for nutrients. As there are not enough nutrients available for the algae, the growth rate decreases dramatically and the filamentous algae wilt during the growth phase during the 3 week application. Other aquatic plants are not affected by the use of Alg-Stop BIO. Alg-Stop BIO does not act directly on the aquatic plant and does not contain any biocidal active ingredient. To improve the well-being of pond fish, Alg-Stop BIO enriches pond water with valuable minerals. Alg-Stop BIO is also very suitable for swimming ponds and is harmless to people, all inhabitants of the pond and also to the animals that drink in it. REQUEST: For the first application, add 1 kg per 20,000 liters of pond water for 3 weeks, once a week. Then 1 x per month 1 kg for 30,000 liters of pond water. Sprinkle Alg-Stop BIO over the entire surface of the water. With regular use, the biological balance is achieved, the water becomes crystal clear and algae are considerably reduced. The other anti-algae agents are superfluous. INGREDIENTS: Natural minerals, stone flour, clinoptilolite, magnesium sulfate.