I use Talstar Pro off of Amazon. 2 years in NW Florida without a single fire ant!
Active Ingredient: 7.9% Bifenthrin; Target pests: Talstar Pro controls over 75 different pests; everything from spiders, mosquitoes, cockroaches, ticks and fleas to pillbugs, chinch bugs, earwigs and millipedes
Application area: Inside, outside, around the perimeter, and even in food handling areas
Pet safe: Yes, when dry.; Always read the label before use