Stray Voltage Question

[Stones]

Just out of curiousity, I tested the AC voltage in my tank today and to my suprise it measured at 25 V!!!

I've read through all of the threads on stray voltage on Canreef, as well as many articles on it as well but I'm not exactly sure what to do.

I unplugged all of my equipment and the voltage dropped to zero. It seems that not one single piece of equipment is causing the problem but rather nearly everything electrical is contributing somewhat to the total voltage. The main culprits are my JBJ top off at 4.6 V, a maxi-jet at 17.3 volts (now destined for garbage can), and a mag 18 at 5V (although my other mag 18 tests only at 0.3V???). I know that 25V is far beyond what is acceptable in a reef aquarium and I am worried that some of my fish could develop HLLE as a result. So far none of the inhabitants show any symptons athough my tomini tang has been unusually skiddish lately.

Does anyone know of any options to resolve my problem. I've done lots of reading on grounding probes and although some swear by them, there are a decent number of articles that condone their use and state that grounding probes only provide a means for the electricity to exit the aquarium so voltages will read low, but there will be a constant current passing through the aquarium which will still generate problems.

Currently, the electricity for the tank is provided by 2 grounded extension cords that are not plugged into GFI sockets, due to being in my basement (rental townhouse).

If anyone has any info to help, it would be greatly appreciated. Thanks