The Amdro product I used (and found worthless) was the Amdro Ant Block, so I have no experience with their fire ant product (thankfully we don’t have fire ants around here). That stuff may work very well.
Fire Ants: Guess Where They Got Off The Boat?
"Red Imported Fire Ants invaded the U.S. in the late 1930's on ships from South America that docked in Mobile"
I'm in Mobile.