Hello, I was contacted by a friend about a shock he was getting at his biz that sells live fish and shrimp ? He stated it doesn't happen all the time so I told him to turn off the main breaker and see if it still happens . He did it does still shock him . Nothing extreme but how much does it take to kill baitfish and shrimp ? Then told him to contact the power company and they "checked" their side and said nothing was wrong . I also asked if it was at night in case a street light was the cause. I put a tester on the chain link fence around the tanks and got .5 volts. Any suggestions from those of you out there ? Thanks in advance.