Algae Defense is a fast-acting algaecide and works on a broad spectrum of algae. For best results, begin applications early in the spring when water and temperature reaches 60° F and above on growing algae. Early applications will reduce the amount of Algae Defense needed and reduce the amount of excess nutrients caused by dead algae. Unless steps are taken to reduce the overall nutrients in your pond, multiple applications may be needed for a full season of control. Mix in a tank sprayer. Spray algae directly. Treat only up to half of the pond’s surface, waiting 10 to 14 days before treating the second half. In hot weather or when fish are stressed, treat 1/4 to 1/3 of the pond at a time. For deeper water place the sprayer’s tip beneath the water’s surface. Dosage Rate: 2,000 square feet: 1 quart Algae Defense, 2.5 gallons water 4,000 square feet: 2 quarts Algae Defense, 5 gallons water 8,000 square feet: 1 gallon Algae Defense, 10 gallons water Restrictions: Algae Defense may be toxic to Trout if carbonate hardness of treated water is less than 50 ppm. Most surface waters exceed this limit and pose no threat. If in doubt, use the Water Hardness Test Kit. Do not use if you have Koi or Goldfish. No other water use restrictions.
This product is designed to be used in ponds that have earth bottoms. It is save for game fish but should not be used in ponds that have trout, goldfish, koi or any ornamental species.
To make sure that your pond has oxygen levels that are safe, (if you do not have an aeration system) you should treat your pond in thirds, waiting several days in between treatments.