I hate fire ants. No joke right. If ever a creature needed to be endangered those would be it. I have developed a keen sense of feel when it comes to ant mounds. I feel my feet step in some soft ground I immediately start stomping to get those things off my shoe before they get to the skin. I have found a good product for them. I use it on my own lawn and a few customers. It is guaranteed to work all year and it pretty much does. The weather has some effect on the ants also. I have to put some extra stuff on some mounds during the year but not many. The product is "Over & Out" and you can get it at Walmart & Home Depot. You can spread it with a spreader as it is in Granules. What products have you all used for fire ants or even other pests in your lawn service business?