Bob,
Kelly is a source of great professional advice.
I will offer you a little input in response to your questions based on just my experience.
(1) Use the granules when the algae first start to appear in early spring. Depending on the type, it appears as a blob forming on the pond bottom before it rises to the surface to show its ugly side. The granules work subsurface especially well. Kill the algae before it spreads. (2) Just throw the granules (with hand protection) on the algae. (3) Follow the directions on how much to use. (4) The application only lasts about two weeks or less depending on your nutrient load. (5) Cutrine Plus is the best product I have found�except for Tilapia and that is another totally different story (see my posts on the wonders of Tilapia eating algae). (6) Your algae will come back not only next year but very likely next week unless you address the nutrient load. (7) see (6). Good luck.
