Electrocution hurts

[digital-audiophile]

I found that I was having stray current in my tank, I would put my hand in and feel a tingle, I added a grounding probe and tried each piece of equipment but coul not determine the source, this was a couple weeks ago. On the weekend I was doing a water change and cleaning my sump, since I am using sleath heaters I don't mind pulling them out of the water to wipe the detrious off and check the temp setting. Well when I went to pull one of the sleath heaters up I got zapped pretty bad. Unplugged the thing and threw it in the trash.

I'm not sure what I am getting at here, maybe just a heads up about stealth heaters? I'm not sure if anyone else has had the same thing happen with one.