How do you check for stray voltage?

[MargieInAZ]

Just wondering, as my GFCI went off last night. I reset it, and all seems okay since then, but in thinking about it, there may have been a reason it went off.
I have quite a bit of equipment running: pumps, skimmer, lights, powerheads... and I'm thinking I very well could have a voltage problem with something. How does one test for stray voltage?

[Don-Coraleone]

you would feel it when you stick you hand in the tank.it would be alittle tingle.

[Michael]

have a read of this, its not exactly a great informative article but gives you a rough idea, i dont think its great tbh, however it may help


http://saltaquarium.about.com/library/weekly/aa101602.htm

[RyanMcLaughlin]

I found it when I stuck my hand in the tank and I got shocked.

[greggnyce]

You can purchase a tester in the elect section of home depot or lowes for 10 bucks It is great to have handy, You just touch it on the wire and it will beep. The last time I ahsd stray voltage from a powerhead I held it 6" off the water and it went off.