Having ants in your house gives you your only opportunity to let them create the causes for enlightenment. If there are many ants, put them in a plastic bag or container and then carry them around holy objects, keeping the bag at the same level as the holy objects.

If you carry them around 20 holy objects (statues, stupas, or scriptures of the Buddha), then it means you are giving them 20 causes of enlightenment and 20 causes of liberation and a higher rebirth. This is from taking the ant or any sentient being around the objects one time.