Sorry to hear this and it is definitely not limited to wilds. I have communicated with others who had domestics do this. When I treated with metro it do not seem to work. Some folks have had success with turning off the lights and covering the tank into near darkness for about four days. Light feedings and small WCs during this time.
When you remove the cover allow the fish to slowly adjust to the light. leave the tank light off and room sort of dark if possible.
Also remember that there are other causes for darting/whirling like water quality etc.
Pat