Simply pour 2 cups of club soda directly in the center of a fire ant mound. The carbon dioxide in the water is heavier than air and displaces oxygen which suffocates the queen and the other ants. The whole colony will be dead within about two days. Each mound must be treated individually and a one liter bottle of club soda will kill 2 to 3 mounds.
Read about how to kill fireants. What is the best fire ant killer for fireant control? Killing fire ants takes patience and perseverance, not to mention, a bit of courage. There are many ways to remove fire ants. Click here for information on several methods of fire ant control, from drowning to bait to a natural fire ant killer.