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					Originally Posted by TheReefGeek
					
				 
				Make sure you still measure your tank once and a while for stray voltage, or the grounding probe might disguise a malfunctioning device. 
			
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 How does one measure for a stray voltage? Would u really know by sticking your hand in the water? 
Emily, do you find a probe is a must have? Never used one, maybe I should have all these years. 
Be curious of you guys thoughts on the subject.
Thanks a bunch,