Stray AC voltage in tank

[Delphinus]

Every so often I test my tank with the multimeter to make sure I find nothing. Yesterday I found something. I got no DC reading, but I got a slight nonzero AC reading.

The thing is, the heater and all pumps, essentially all submerged items, were unplugged. All that had power was the lights and the fans in the canopy.

Does this make any sense?

I'm going to try the test again, this time with the lights and canopy fans off. If I get a zero reading with them off I guess I've found my cuplrit; but ... there's no contact with the wiring to the water? How can I get a current?

The only thing I can think of is that the ground I used is on the same circuit as the lighting, but even so I'm not sure it makes sense to me yet.

[ 13 April 2002, 14:19: Message edited by: delphinus ]