Used these with typical elimination in less than a day.

Amdro Ant Block Home Perimeter Ant Bait and Ant Killer, 24 Ounce

This is for the non fire ant type of ants. Used to get ants in kitchen about once a year. We simply sprinkled the granules sparingly next to the outside wall of the kitchen. Ants were gone the next day.

ORTHO Orthene 12-oz Fire Ant Killer

About a teaspoon of this sprinkled on top of the fire ant mound. Seems to kill them very quickly. That mound is typically not active again so they're either dead or moved further away.