The treatment methods for controling ants is different from that of other general pests like spiders etc. The reason is that the apparent damage which you see on your pavers or gardens is just 5% of the whole. Which means the small sand dunes are just the passage ways of ants to reach their nests. There might be hundreds of nests under the ground and therecould be a large colony harboring under your house. Killing the queen ant and eliminating the colony is the major job.