Weed Management in Small Ponds
The presence of some vegetation in small ponds is desirable for appearance and to enhance the habitat for fish, but it is important to maintain a good balance between vegetation and other aquatic life. Selecting a good pond site, designing the pond properly, and keeping nutrients in runoff water from reaching the pond are the most important ways to prevent excessive growth of aquatic weeds.
The link address is: http://www.weedscience.ncsu.edu/aquaticweeds/ag-437.pdf