Well, sort of. I also get 11 volts from the main tank. But nothing seems to be particularly disturbed? And I get no zing from there with my hand in the water - the amperage must be pretty low? I've done some research, and it seems that pumps DO put out some voltage into the surrounding water - and ALL of my pumps seem to do that! And, it's AC voltage - using DC gets no indicator. I checked my 55 too - and have 24 volts there! I only have DC amps on my meter, so I didn't check the amperage. It's very low, though.

In any case, I bought a grounding probe. We'll see what happens with it.