Prowlerwolf

Is there a way I can manipulate or configure an "Action Group" to remove a stage once its fuel reserve has been used up? An example of this would be to have a fuel tank detach on its own by triggering the next stage or a specific stage. I'm a little unsure as to how action groups work or what their purpose is but I will continue to look into it, if anything this would help anyone looking for a similar answer. Thanks