Borax has been a proven ant killer. The key is making the right ratio of borax to sugar. Too much borax and the ants won't take the bait. This is not a spray formula or a syrup formula. It is a drier mix that gets put in bait containers and will last for quite a while. The first two days may bring more ants and then you should see a decrease. There are many types of ants. If the 6 to 1 ratio isn't effective, go to a 3 to 1 ratio. The ratio has been effective on my black sugar ants. Please Help Support My Channel: The Rusted Garden - Thanks! Please Visit The Rusted Garden Seed & Garden Shop: https://www.therustedgarden.com/ Here is The Rusted Garden Link to Amazon for Seed Starting & Gardening Supplies http://amzn.to/2FgufvF Thanks for using my link. It helps fund my garden videos! Subscribe to My YouTube Channel (800 Garden Videos) - The Rusted Garden: https://www.youtube.com/user/pilarchik Follow me on Instagram for Harvest Pictures, Updates and Monthly Give-Aways: https://www.instagram.com/therustedgarden/ Visit My Original Blog The Rusted Vegetable Garden: http://www.therustedgarden.blogspot.com Contact Me at therustedgarden@gmail.com