I just purchased a used Southwest Spa with a Nu Wave Spa MM#1 Control. The previous owner of the house had 220 running to his deck. My plan was to utilize the GFCI he had set up. When I opened the panel he had 2 black wires and a green coming from the main. The GFCI has a White pigtail on it. The tub has a red, black, white and green. There is a metal spike in the ground under the panel with the GFCI - not sure what was hooked up to it.

With no neutral coming from the main am I able to hook the spa up and if so can someone walk me through the neurtral and the ground?

Thanks