@CanadianSpaTech hi so I've just got home from work and done the same test again, now this time I ran a earth rod into ground and then measured from the water to the rod, same reading a 0.2v. I also did the same wet foot test I know I shouldn't be I wanted to be sure I'm not just going crazy, same result if I am ground and wet feet and touch the water I feel the discomfort of the shock. Now for the fun part.. I switched isolator off and re did the same test and still recieved 0.2v and a tingle when I touch the water and I'm grounded. How?!