TERRO Liquid Ant Bait Stations Review: Does It Work?

TERRO ant bait works — but most people use it wrong. Here’s how it actually kills the colony, what to expect, and how to get the best results.

You’ve got ants in your kitchen and you want them gone. You’ve probably already tried spraying them — maybe even wiped out a whole trail — and then watched a new one appear two days later in a completely different spot. That’s the thing about ants. Killing the ones you see does almost nothing. The colony is the problem, and the colony is somewhere you can’t reach.

TERRO liquid ant bait is one of the most recommended products for indoor ant problems, and there’s a reason it keeps coming up. This review covers exactly how it works, whether it’s actually worth buying, and how to use it so it does what it’s supposed to do.

The Short Answer

Yes, TERRO Liquid Ant Bait Stations work — and they work well for most common indoor ant species, especially the small black or brown ants that show up in kitchens and bathrooms. The active ingredient is borax, which kills slowly on purpose so worker ants carry the bait back to the colony and share it. You’ll see more ants before you see fewer, and that’s a good sign. Most infestations are under control within one to two weeks of consistent baiting.

What Is TERRO Liquid Ant Bait?

TERRO has been around since 1915. That’s not a marketing number — it means this formula has been tested against real infestations for over a century, and people keep buying it because it keeps working.

The T300B is their indoor bait station version. You get 12 pre-filled stations in a pack — snap them open and place them. No mixing, no mess, no refilling required. Each station is a small plastic tray with a reservoir of liquid bait that ants can access through a small opening.

The active ingredient is borax at 5.4%. Borax is a naturally occurring mineral compound that’s toxic to insects but has a very low toxicity profile for mammals — one reason TERRO is popular with households that have kids and pets.

→ Check the current price on TERRO Liquid Ant Bait Stations on Amazon — the 12-pack gives you enough stations to cover your whole home.

How Does It Work?

TERRO works on the same principle as Advion roach gel — slow kill by design, colony spread by intention.

Here’s the sequence:

1. You place stations along ant trails and near entry points.
2. Worker ants find the bait, which smells and tastes like food to them — it’s a sweet liquid that mimics the sugary substances ants forage for naturally.
3. Workers feed on the bait and carry it back to the colony to share with other workers, larvae, and the queen.
4. The borax disrupts their digestive systems, but slowly — slowly enough that the ant makes it back to the nest first.
5. The bait spreads through the colony. Workers die. Larvae die. In a successful treatment, the queen dies too, and the colony collapses.

If you kill ants on contact with spray, you never get the colony. New workers replace the ones you killed within days. Bait reaches the source — that’s why it actually solves the problem instead of just managing it.

Which Ants Does It Work On?

TERRO is most effective on sweet-feeding ant species, which covers most of the ants people find indoors:

• Argentine ants — the most common household invader in many regions
• Odorous house ants — the ones that smell like coconut when crushed
• Pavement ants — small, often found near foundations and in kitchens
• Little black ants
• Ghost ants
• Acrobat ants
• Cornfield ants

It is not effective on carpenter ants or fire ants. Carpenter ants are protein and fat feeders — they’re not interested in sweet liquid bait. Fire ants need a different bait formula altogether. If you’re dealing with large black ants boring into wood, or red ants with a painful sting, TERRO is not your product. Check our ant identification guide to confirm what species you’re dealing with before you buy.

The Part That Trips Everyone Up

This is the most important thing in this review, and if you skip everything else, read this part.

When you first place TERRO stations, you are going to see a lot of ants. More ants than before. Sometimes what looks like an explosion of ant activity around the stations. People panic, think the bait isn’t working, and either move the stations or spray the ants — which destroys the entire treatment.

That surge in activity is the bait working exactly as designed. Worker ants found a food source and they’re recruiting the colony to it. The more ants feeding on the bait, the faster it spreads through the nest.

Do not spray. Do not move the stations. Leave them alone.

The surge typically peaks around day 3–5 and then drops off noticeably as the colony starts dying from the inside. By day 10–14 most infestations are under control. It takes patience, but it works.

How to Use TERRO Bait Stations Correctly

Where to Place Them

Follow the ant trails. Watch where ants are traveling and place stations directly in those paths. Ants will find bait faster if it’s in their existing routes.

Good placement spots:

• Along the kitchen counter edge where you’ve seen ant trails
• Under the sink — especially near pipe gaps where they’re entering
• Along baseboards in the kitchen and bathrooms
• Near windowsills if ants are coming in from outside
• In corners of pantry shelves
• Along the back of cabinets
• Near pet food and water bowls if ants have been hitting those

Don’t hide stations in random spots away from activity. Place them where the ants already are.

How Many to Use

Use more than you think you need. TERRO recommends placing multiple stations — the 12-pack exists for a reason. For a kitchen infestation, use 4–6 stations in different active spots rather than placing 2 and hoping for the best. More bait access points means more workers feeding, which means faster colony collapse.

What to Do While You Wait

Don’t clean up the ant trails with bleach or spray. That destroys the scent trails ants use to find the bait. Don’t use any insecticide anywhere near the stations. Don’t move stations that have ants on them — that disrupts the feeding cycle.

Do check stations every few days. If a station has been fully consumed, replace it with a fresh one. Empty stations mean the bait is working — keep fresh bait available until activity stops completely.

Tip: If ants aren’t finding the stations within 24 hours, place a tiny dot of honey or jam right at the station opening to draw them in. Once they find it, they’ll keep coming back for the borax bait.

What Results to Expect and When

• Day 1–3: Ant activity increases around stations. This is expected and good.
• Day 3–5: Peak activity. Potentially a lot of ants around the stations. Leave them alone.
• Day 5–10: Activity starts dropping noticeably. Fewer ants at stations, fewer ants overall.
• Day 10–14: Most moderate infestations are largely resolved. Maintain fresh bait through this point.
• Day 14+: If activity is still significant, place fresh stations and give it another week. Larger or more established colonies take longer.

Is It Safe Around Kids and Pets?

TERRO is one of the more family-friendly pest control options out there. Borax has a very low mammalian toxicity — it’s used in laundry detergents, cleaning products, and has been around as a household mineral for generations.

The station design also helps. The bait is enclosed in a plastic housing with a small access opening sized for ants — not easy for a child or pet to get significant quantities out of. Compare that to soaking baseboards with spray or setting off foggers in your kitchen. TERRO is the lower-risk option for most households.

That said — keep stations out of reach of very young toddlers who mouth everything, and don’t let pets bat them around the floor. Place them in corners, along walls, and under appliances where kids and pets aren’t constantly interacting with them.

Warning: If a child or pet ingests a significant amount of borax bait, contact Poison Control or your vet. The risk is low but it’s not zero.

TERRO vs. Other Ant Killers

TERRO vs. Raid Ant Spray

Raid kills ants on contact. TERRO kills the colony. If you want to eliminate the problem rather than manage it, bait wins. Spray is useful for the occasional ant you see walking across your counter — it does nothing to stop the thousands more where that one came from.

TERRO vs. Ant Bait Gel

Some people prefer gel bait they can apply directly to surfaces rather than pre-filled stations. Both work on the same principle. The stations have the advantage of being cleaner, contained, and easy to place and remove. For most households, the station format is simpler to use correctly.

TERRO vs. Diatomaceous Earth

Diatomaceous earth is a physical kill — it damages the ant’s exoskeleton and they die from dehydration. It’s effective as a perimeter treatment and a good complement to bait, but it doesn’t reach the colony. Use both for the most thorough approach — bait to collapse the colony, DE to kill stragglers at entry points.

TERRO vs. Calling an Exterminator

For a standard ant infestation in your kitchen, calling an exterminator is almost always overkill. Professionals will often apply bait similar to what TERRO uses, charge you $100–$200 for the visit, and tell you to give it two weeks. You can skip that step. TERRO used correctly gets you to the same place for a fraction of the cost.

The exception is carpenter ants with an established nest in your structure, or fire ants in your yard with aggressive colonies. Those situations may warrant professional help.

Common Mistakes That Ruin Results

Spraying the ants you see at the stations. This is the most common and most damaging mistake. You kill the workers before they get the bait back to the colony. The treatment fails. Don’t spray.

Moving stations because you don’t see immediate results. Give it at least 3–5 days in one spot before deciding it’s not working. Ants take time to find new food sources.

Not using enough stations. Two stations for an active infestation isn’t enough. Use the whole pack strategically across all active areas.

Letting stations run dry without replacing them. An empty station does nothing. Check them regularly and replace consumed ones immediately.

Cleaning ant trails with bleach before treatment. Bleach destroys the pheromone trails ants use to navigate to the bait. If you’ve already cleaned, give it 24–48 hours for them to re-establish trails before placing stations.

How to Keep Ants From Coming Back

TERRO collapses the current colony. Keeping them gone requires removing the reasons they showed up in the first place.

Find and seal their entry points. Ants come in through cracks in foundations, gaps around window frames, spaces around pipes, and under doors. Walk your perimeter and caulk every gap you can find. Check under every sink for pipe gaps in the cabinet wall.

Eliminate food sources. Crumbs on the counter, sticky spots near the stove, spilled juice under the fridge — ants find all of it. Wipe down surfaces regularly, sweep under appliances, and don’t leave dirty dishes sitting out overnight.

Store sweet and sticky foods properly. Honey, syrup, jam, sugar — anything sticky in an unsealed container is broadcasting a signal to every ant within foraging distance. Sealed containers with tight lids.

Fix moisture problems. Like most bugs, ants are attracted to water. Dripping pipes, condensation under the sink, and standing water all draw them in. Fix leaks and keep things dry.

Keep a station or two active as maintenance. After the infestation is cleared, leaving one fresh station under the sink and one along the back of a cabinet catches new scouts before they recruit a colony. Swap it out every few months. It’s the cheapest insurance you’ll find.

If you’ve got ants coming in from outside along with other bugs, it’s worth reading through our pest FAQ to see if there are other entry point issues contributing to the problem. And if you’re also dealing with roaches in your kitchen alongside the ants, check our roach guide — the two problems often share the same root causes and fixing one often helps with the other.

Ants are fixable. They’re frustrating and persistent, but TERRO used correctly breaks the cycle. Place the stations, leave them alone while the bait does its work, and give it two weeks. Grab a pack of TERRO T300B on Amazon and get started today — the 12-pack gives you enough coverage for your whole home with stations left over for maintenance.