kylenotkurt

So I bought a brand new MasterSpas Twilight 7.4 about two months ago. It’s been working great- until two weeks ago I started feeling a small current of electricity coming off of the water. Thur multimeter reads the voltage at about .4V in the water and I can also pick up 1.0V on the waterfall metal coping. The electrician that installed the tub has been out here for about 8 hours total checking everything. Unhooking and changing out grounds, checking the breaker, checking the utility poles at the road, nothing seems to make this go away. We even disconnected everything from the hot tub. And I mean everything. The grounds and all of the electrical. Still getting voltage from the water and actually too picking up 0.4V from the terminals where we disconnected the wires. what is going on here?? The tub is on a concrete slab, recently poured 4 months ago.