Where do you put your grounding probe?

[goldrimtang]

I had a big problem with voltage in my tank, the main issue was that I discovered it kind of late.
A good way to answer your question is to get a hold of a voltmeter and check the voltage of the water. Test both in the sump and tank, and with and without the probe. Playing with this I eventually did the following to solve my problem :
- Put a probe in the sump, plugged to a well grounded power strip.
- Ground the lights (they were the main source of electricity in the water)
- Make sure all the power strips are plugged to grounded outlets

Emil