I recently purchased a brand new hot tub. I installed the electrical with a 10 ft cord tied directly to the house panel with an 8-4 SJ cord. In the tub's control box, I terminated the hots, neutral and equipment ground. I also ran a #6 stranded bonding conductor to all of the metal lugs, motors, etc. and ran that back to an 8 ft ground rod right next to the tub, 10ft from my service ground rod. The other night I went to check the chemicals, I felt a tingle. I immediately retrieved all my testing equipment and found 1 volt between the water and my brick wall. I turned the GFCI breaker off and it was still there.I originally did not have a seperate ground rod on the tub, I had the bonding conductor run back to the grounding bus in the panel, thinking I would be bringing the water, etc. to a 0 potential. The seperate ground rod did not make it dissapate. Any suggestions?