Do I have stray Voltage?

[PoonTang]

Originally Posted by outacontrol

is everything plugged into GFCI outlets?

Yes everything is on a GFI. I have 2 dedicated GFI circuits for my tank.
I just did a little bit more reasearch and found out that that you measure AC Voltage. I got 21. I started unplugging things and sometimes the voltage actually goes up.??? Most of the voltage is coming from my 2 Korrilia K4's but i can actually make the voltage go down by unplugging 1 that is not even turned on by my controller. Anyone else running Korillias that they can test? Is 21V even something to worry about, apparently stray voltage is linked ti HLLE and mysterious deaths neither of which i have.