Testing 7 Best Indoor Ant Killers [Tested By A Pest Technician]

Are ants taking over your home? Well have no fear, with my 20+ years of pest control experience, I’ve treated thousands of ant infestations I wanted to finally lay it to rest on what the best ant control treatment available on the market is. We went through and tested each of the following treatment options, and the results are in! These are all treatments available to homeowners rather than professional-grade chemicals.

Quick Look At The Best Ant Killers:

  • Terro T300B Liquid Ant Bait – Best Overall Ant Killer
  • Syngenta Advion Ant Gel Bait – Best For Severe Infestations

Why You Should Trust Us

With over 20 years of experience in pest control, being both an owner and a technician, we at The Pest Informer have seen our fair share of ant infestations. Although professional treatments can be extremely effective, most times you can get the same results with store-bought ant killers if used correctly.

We have experience using, testing, and recommending all these products, and we are confident that any of the products recommended in this post will help eradicate your ant infestation.

1. Terro T300b Liquid Ant Baits

The Terro T300b liquid ant bait traps are the golden standard of ant killers. With the active ingredient being Borax, this is a pet-safe ant killer that attracts ants to the trap and then allows the ants to deliver the treatment to the rest of the colony. This means the entire colony will be killed rather than just the ants you can see.

Terro T300b Bait Station Box


  • Type: Liquid ant bait
  • Active Ingredient: Borax
  • Target Pests: Ants
  • Coverage Area: Up to 1,080 square feet.


  • Extremely affordable (Generally $10-$20 for a pack of 12)
  • Highly effective insect killer, especially in eliminating ants
  • Easy to use, no mixing or preparation required
  • Can be used indoors and outdoors
  • Uses Borax as the active ingredient which is much safer for humans and pets compared to traditional pesticides.


  • May take some time to see results – This is because it has a delayed killing effect to ensure that the treatment is delivered to the entire colony.
  • May attract more ants initially, including worker ants and a few ants of different species – But after a few days it will kill the entire colony.

Terro T300b Liquid Ant Baits, also known as Terro Liquid Ant Baits, has gained a reputation as one of the best ant killers on the market due to their effectiveness and ease of use. These bait stations offer the following benefits:

  • They contain a slow-acting poison that attracts ants and allows them to carry the bait back to their colony, ultimately eliminating the entire population.
  • The liquid bait requires no mixing or preparation, all you have to do is snap off the end tab, and place it. Which makes it convenient to use.
  • They can be placed in areas where ants are commonly found, such as kitchens, bathrooms, and entryways.
  • Uses 5.4% solution of borax, which is deadly to ants, but safe to humans and pets.

Despite the high effectiveness of Terro T300b Liquid Ant Baits, patience is needed to allow the product ample time to work. An initial increase in the ant population is common as they are drawn to the bait. This surge is temporary, and the ant numbers will begin to dwindle once the poison starts acting.

Pros of Terro T300b

Terro T300b Liquid Ant Baits offer several advantages over other ant control products. One of their most significant benefits is their affordability, making them an accessible solution for homeowners dealing with ant infestations. The bait stations can be reused, adding to their cost-efficiency.

Terro Liquid Ant Bait individual station

Another advantage of Terro T300b Liquid Ant Baits is their ease of use. The pre-filled bait stations can be placed in areas where ants are present with minimal setup. The slow-acting poison targets the entire colony rather than just individual ants, ensuring a long-lasting solution to your ant problem.

Cons of Terro T300b

While Terro T300b Liquid Ant Baits are highly effective, there are some potential drawbacks to using this product. One of the primary disadvantages is the liquid nature of the bait, which may cause spills and damage surfaces if the stations are knocked over.

Careful handling and placing the bait stations on flat surfaces can help avoid spills. If a spill occurs, it can be cleaned up using hot water and a paper towel. Regular monitoring and replacement of bait stations are also crucial for maintaining their effectiveness.

User Experience with Terro T300b

Terro T300b Liquid Ant Baits has received thousands of positive reviews from users who have successfully eliminated ant infestations with this product. Many users appreciate the simplicity of the bait stations, as well as the overall effectiveness of the liquid bait in targeting entire ant colonies.

placing a terro t300b ant trap

Overall the ease of use makes it great for perimeter ant control, indoor ant control, or apartment ant control.

Keep in mind that individual experiences can differ, and various factors like the severity of the infestation and the ant species can influence the results. In some instances, trying out multiple products or consulting a professional exterminator may be required to achieve the desired outcomes.

Overall, by spending less than $20, you can purchase arguably the most effective ant killer on the market without the risk of harsh or dangerous chemicals. The Terro T300b receives a 10/10 review from us!

2. Syngenta Advion Ant Gel Bait

The runner-up on our list is the Syngenta Advion Ant Gel Bait. This ant killer is extremely effective (arguably more effective than the Terro T300b), but with this extra effectiveness comes a higher price and a little bit more setup involved.

Syngenta advion ant gel bait

I generally recommend testing out the Syngenta Advion bait traps if the Terro T300b doesn’t work for your infestation.


  • Type: Gel Bait
  • Active Ingredient: Indoxacarb
  • Target Pest: Ants
  • Quantity: 4 x 30 Plungers of Gel


  • Effective in eliminating ant infestations
  • Easy to use
  • Attracts ants with highly attractive gel bait
  • Kills the entire ant population including the nest


  • May not work for all types of ants
  • Indoxacarb is harsher than borax, and you’ll need to be more careful around pets and children.
  • Applied via gel plunger rather than simply opening the trap and placing it like the Terro T300b.

Syngenta Advion Ant Gel Bait is a powerful ant control product designed to attract and kill ants effectively. The gel bait is formulated to be irresistible to ants, ensuring that they will consume it and bring it back to the nest. As a result, the queen and the entire colony are eliminated. The gel bait is easy to use and can be placed in areas where ants are commonly found, both indoors and outdoors. If you are looking for mainly outdoor use, then take a look at our guide on lawn ant treatments!

Despite its high efficacy, Syngenta Advion Ant Gel Bait might not work on all ant types. Moreover, if ingested, the bait could harm pets, so caution is necessary to ensure the gel bait is positioned out of the pet’s or children’s reach.

Pros of Syngenta Advion Ant Killer

Syngenta Advanced Research. Ant Gel Bait offers several advantages over other ant control products. Here are some of its features:

  • Unique formulation that is highly attractive to ants
  • Rapid mortality and quick knockdown of the entire ant population
  • You have more control over the placement since it’s delivered via a gel plunger
  • More knockdown power compared to Terro T300b
  • More effective against other species of ants including fire ants and carpenter ants

Another significant advantage of Syngenta Advion Ant Gel Bait is its ability to control multiple generations of ants with just one application. This feature reduces the need for repeated treatments, saving time and money for the user.

Cons of Syngenta Advion

The main cons of using Sygenta compared to Terro is that Sygenta is slightly more expensive, you have to place the gel yourself (rather than just placing the trap down), and the active ingredients are slightly more dangerous, so you’ll need to be careful around children and pets.

That being said, if you tried the T300b’s without success, then I’d recommend Syngenta because it is more powerful.

User Experience with Syngenta Advion

Syngenta Ant Gel Bait has received positive reviews from users who have found it effective in controlling ants and cockroaches. The fast-acting formula and ease of use are frequently praised in user reviews, making it a popular choice for those dealing with ant infestations.

It’s important to note that individual experiences may vary, and the effectiveness of the product can be influenced by factors such as the type of ants and the severity of the infestation. In some cases, users may need to try multiple products or consult a professional exterminator to achieve the desired results.

Essential Factors to Consider When Buying Indoor Ant Killers

Several factors come into play when selecting an indoor ant killer to guarantee optimal results. Initially, pinpointing the type of ant infestation is crucial as different ant species may necessitate varied treatment methods. This information will guide you in choosing the most suitable product for your particular situation.

The effectiveness of the ant killer is another crucial factor to consider. Both Terro T300b Liquid Ant Baits and Syngenta Advion. Ant Gel. Bait has been proven to be highly effective in eliminating ant colonies. However, it’s important to be patient and give the product time to work, as the number of ants may initially increase before decreasing as the poison takes effect.

Safety is a significant concern, especially for households with pets and children. When selecting a pet safe ant killer, it’s essential to choose a product that is safe for use around pets and children. Terro T300b Liquid Ant Baits are pet-safe ant traps, while Syngenta Advion Ant Gel Bait should be placed in areas inaccessible to pets and children.

Finally, when choosing an indoor ant killer, consider its ease of use. Both Terro T300b Liquid Ant Baits and Syngenta Advion Ant Gel Baits are user-friendly and require minimal setup. Simply place the bait stations in ant-infested areas, and let the product do its job.

Final Thoughts On The Best Ant Killer On The Market

In conclusion, both Terro T300b Liquid Ant Baits and Syngenta Advion Ant Gel Baits are highly effective and easy-to-use indoor ant killers. Terro T300b Liquid Ant Baits offer affordability, convenience, and effectiveness in eliminating ant colonies, making them an excellent choice for homeowners on a budget. Meanwhile, Syngenta Advion has been acquired by Syngenta. Ant Gel Bait provides a powerful and versatile solution that targets a variety of ant species, ensuring rapid elimination of ant infestations.

When selecting an indoor ant killer, it’s essential to consider factors such as the type of ant infestation, effectiveness, safety, and ease of use. By taking these factors into account, you can choose the right ant killer for your specific situation and enjoy a pest-free home.