The beneficial microbial powder should be applied before the algae takes hold for the season. Typically the best time for application is in the spring since algae populations typically die-off from the lack of sun in the winter months.
We recommend the addition of microbes 1-2 months before seasonal, cyclic algae growth typically starts (ex. March- April in the Northeast.) If there is heavy nutrient loading, microbes can also be added in July or August or if the pond water starts to become cloudy - a sign that nutrients may be building up. Aeration is always a help in stagnant areas where natural wind flows are blocked.
A typical dose is 1 lb per 200 linear feet sprinkled from a scoop about 6 inches from the edge, around the entire perimeter of the pond. Stay low with the scoop to prevent wind from carrying the powder away. Also, a shovel of microbes tossed up-wind to scatter the microbes in the middle of the pond or alternatively 2 lbs mixed with water and sprayed will provide a bonus treatment if the pond has a history of very heavy overgrowth. We will provide custom dosage and application instructions upon request.