Have a small pond with filamentous algae's and coontail growing out to about 4ft. Both are found around 100% of the perimeter of the pond. The vegetation is using too much of the nutrients and clearing up the water in the summer months. If I decide not to go the biological route, what chemicals would be used to effectively target the submergence coontail and algae? And would a granular approach be better as apposed to a liquid approach for targeting submergence vegetation?