HT,
If you were to do a search you would find a simmilar issue.
Actually, if this real, you may want to call the Car Talk guys on NPR. I heard a caller one time ask them how he could run a 12V current through his whole car so that he could keep his goats from climbing on it. He situation was different than your though, because he drove his car.
I think we all need to see a picture of your setup to help us verfiy that it is indeed real.
By chace, do you have the tire hanging on the fence next to the hottub for a life perserver. Safety first you know.