How to Get Rid of Ants with Three Ingredients
Borax, water and sugar. But takes about 2 weeks. I did not use the cotton balls I place the mixture into old bottle caps or directly onto the concrete.
I also used Raid Ant Killer Liquid:
Canadian Tire - RaidŽ Liquid Ant Killer customer reviews - product reviews - read top consumer ratings
Works like a charm the ants eat it right up and I just kept adding more. Dead Ants everywhere. But the down side is, once the second set of eggs hatch those buggers know not to eat it, then you just change brands and they start eating it once again. Takes a few application to wipe them out completely.
I had a massive ant problem in my back yard these past 2 years and this year finally got rid of most of them.