Are these shockers any good?

http://www.amazing1.com/fishing_aids.htm

http://www.amazing1.com/download/FISH80IN.pdf

See the above link...has anyone every bought our used one of these?

Battery operated device intended for identifying and tagging of fish as they float to the surface. Works excellent on bottom feeders. Built into a plastic cylindrical housing with external controls and water conductivity indicator. Operates from boat battery or other 12 volt source. Shows several methods of drag chains and selective stunning probes.

FISH8 - Plans...$15.00
FISH8K - Kit/Plans For 12 Volt DC..$129.95
FISH80 - Assembled and tested......$169.95

Lower Power Catfish Unit
FISH1 - Plans.......$5.00
FISH1K - Kit/Plans ........$39.95
FISH10 - Ready to use.......$59.95

When you shock fish they do not "float to the suface" the electric current makes them spasm and they are forced to swim towards the source, if the current is strong enough.

If you are shocking a small stream you can use a small shocker because the fish have nowhere to run. But in a pond the fish feel the weak current and simply swim away.

The small shockers I have seen generaly run on a tiny gas powered generator. The larger ones require a boat. The largest one I have ever used was towed on a tiny bass buddy boat, and powered two wands. The stream we were shocking was around 5' deep at the deepest and had very low conductivity. We had minnows swim next to our wands and show no effect.

I would look for a "toaster", thats the unit that regulates the electricity, that you can attach to your own generator. I wouldn't trust a battery powered shocker, and never in a pond.