I've heard about the pool grid and equipment being properly grounded. My inground is about 20 years old, but I've never seen a grounding wire going from the pump/light power boxes into the ground (and into a rod). Looks like they use the ground wire going back to the main panel. The subpanel for the pump/light has a GFI breaker, like these: http://www.breakerbroker.com/universalgfi.html.
Is this safe/acceptible or do I need to do some updating?