I have a BBQ propame tank that doesn't let a full stream
of propane reach the burners; i.e., even on wide open
(tank and burners) the flame burns low. I don't have this
problem with another tank. Is something wrong with the
tank regulator and can it be fixed.
Thanks.

Dave

If your grill is like mine, the regulator is on the hose,
not the tank itself.
So it can't be a regulator problem.

I would say that the one tank is just about empty.