Grundulis the fence charger, wire and plastic pipe cost me less than $200 dollars to do the pond, It uses almost no electricity, just a couple of watts to keep the fence charged, and maybe a few when a critter decides to test it. The 8000 volts is low amperage, it won't hurt you but sure will get your attention. grin
You can also get fence chargers that are battery operated with a solar charger.
The fence should also keep out beavers.

If you want to see how effective they are look on you tube, there are videos of fences repelling grizzly bears, but the best videos are of DUMB people peeing on an electric fence. shocked

Last edited by adirondack pond; 05/27/11 04:13 PM.