Electrical question

[sphelps]

Different GFIs have different ratings. You shouldn't be able to feel the voltage if using a ground probe, if you can feel it the probe isn't working.

It should be noted almost all submerged pumps will put some voltage in the water, but it should be very little. The problem comes from placing an electric motor in a highly conductive salt bath which can result in electromagnetic induction, which will produce a voltage source. This is different from so called "stray voltage" as it is not power leaking from the supply but rather power generated from the magnetic field within the pump.

Also measuring the voltage within the water actually tells you very little about this kind of situation, you really need to measure the current.