Quote:
Originally Posted by matt@concept
Maybe a grounding probe
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Of course, before adding a probe one should check for stray voltage with a multimeter as adding a probe without knowing what's going on can be very dangerous, and possibly harmful or deadly to both yourself and your critters
If you do have stray voltage, adding a grounding probe will give it a path to ground. This is not good unless you have a GFCI
With a multimeter set to 120VAC, put the red (positive) probe in the tank water and the black (negative) probe into the d-shaped socket in any outlet
If you do find current in your tank, unplug one piece of hardware at a time until you find the culprit
Any current above a couple volts should be investigated, but sometimes you can get a reading just from lights above water creating a 'field' (for lack of the proper term)