Everything in our pool is grounded yet when we touch the concrete when wet or in the pool we get a mild shock. Turned off all electric and we still get it. Had numerous people out and still no solution. We have a fiberglass pool with salt not chlorine. Any suggestions.

Some electric must still be present. Could be a light circuit or something not connected to the pool wiring.

This could be a very difficult one to solve. You may have something electrical, completely unrelated to the pool that ISN'T grounded (or isn't properly grounded) that's shorting out. Since it's not properly grounded, the current is taking the path of least resistance TO ground. And that ground happens to be your pool and/or the surrounding area. The worst similar situation that comes to mind was a transformer of the power company, that was a block away.

The only idea I have at the moment would be to first, find a way of measuring the voltage you feel as Mild electrical shock. Then shut off all the power to you house and see if it's still there. If not, you know it's coming from your home, and can at least narrow it down by then shutting off one breaker at a time, determining which line is causing the problem, and maybe then figuring out what "appliance" on the line is at fault.