NYC CODE ON GROUNDING A OUTDOOR JACUZZI ?

HI I HAVE A 50AMP OUTDOOR JACUZZI THAT I RAN #6 WIRE TO 220 WITH GROUND WIRE. I WAS WONDERING IF I HAD TO INSTALL GROUND PROBES ALSO AROUND THE ABOVE GROUND JACUZZI? OR WILL THE GROUND WIRE #6 DO THE JOB BY CODE?LET ME KNOW IF MORE INFO IS NEEDED. GFCI BRAKE INSTALLED AS WELL