Most don't work at all. Some only act as a repellent ~ causing the
colony to build new mounds a few feet away.
Anything that does work is likely to be expensive and have a worse
effect on your, your pets, your children, wildlife, groundwater, and
surface water than to fire ants.
Further, it is illegal to use these products in a manner inconsistent
with their labeling - they are not labeled for control of any type of
pest.
www.natural-ant-killer.com kills ants instantly and it is inexpensive.
It is 100% safe and organic so it won't hurt pets, people or the
environment.