The only connection to bonding for the water in my vinyl pool is through the stairs (some rust) and the impeller screw in the pump (disintegrating/rusting)..there is no light in our pool, and the only other metal anywhere is the aluminum coping which doesn't contact the water at all.. fiberglass stairs.. nothing else metal in this pool. Yes, we're on a well, and our neighbors are as well, but we're pretty rural (on a 4 acre lot). Our well is over 370 feet away, and our nearest neighbors well is even further. There is an overhead power line that supplies our house that passes nearby the pool, but all within tolerances for distances.