Our Algae Prevention Package consists of a combination of barley straw pellets, beneficial bacteria, and lake and pond dye. Barley straw pellets inhibit the growth of filamentous algae, beneficial bacteria consumes nitrogen and phosphorus in the water column (the nutrients primarily responsible for growth in ponds), and dye prevents sunlight from reaching the bottom of your pond. By applying these three products together, you can significantly decrease the growth rate of algae in your pond. These products are preventative so it is be best to apply them in April or May and a second application should be done in early-mid summer. Packages can be applied at any time of year but the beneficial bacteria is most effective above 50 degrees F. Each package is appropriate for a 1/3 acre pond and consists of: 40 pounds of barley straw pellets, 3 bags of beneficial bacteria, and 1 pouch pond dye.