WOW......dropped a SS bolt in the tank attached to a hunk of 12 ga copper wire hose clamped to a pipe.....STRAY VOLTAGE GONE!! Couldn't believe it, so pulled the bolt in and out a couple times to verify....YUP! From 21.5 VAC to ZIP VAC!I'll probably stop by the lfs tomorrow and pick up a ground probe......according to the internet they're not overly pricey.....we'll se what a local mark up is though. Should be under $20.00? If not I could go the stainless silverware route with a copper wire attached taken to ground.