Being slow-acting, it eradicates the colony in about 2 weeks. 1. Dupont Advion Ant Gel Bait This gel formula includes Indoxacarb as … Outdoors, place ant bait, such as TERRO® Perimeter Ant Bait Plus near foraging trails close to the nest. Find the best price. If the ants do not seem to be taking the bait, switch to a protein-based bait such as Advance 375A Select Granular. 2. TERRO Indoor Liquid Ant Bait This liquid bait is based on Borax that disrupts the insect’s stomach, killing it within 3 days. Try using a sweet-based bait first, such as Advance Liquid Ant Bait or Maxforce Ant Bait Gel. You should probably try this product to kill black ants fast. TERRO® Ant Killer Pluscan be used around the perimeter of the house for immediate control and long-lasting residual control. Indoors and outdoors, ant bait is the most reliable way to eliminate little black ants. Be sure to remove any other food sources when baiting and le… Baiting is the most effective form of control for Little Black Ants. … Indoors, TERRO® Indoor Liquid Ant Bait stations can be used on countertops, in corners and other areas where activity has been seen. Diatomaceous Earth / Silicon dioxide.