How to Get Rid of Ants in Hot Tub: A Complete Guide

Ants can show up almost anywhere in your household, but they can be especially annoying when they appear in the most relaxing areas of your home. Ants are one of the major problems for many hot tub owners in the United States. Carpenter ants, in particular, are known for causing a great deal of damage to wooden hot tub cabinets, especially if the wood is damp or started rotting.

How to get rid of ants in your hot tub? In order to get rid of ants in a hot tub, you will first need to carefully inspect the surrounding area and try to locate the ant colony. The best course of action is to use ant baits as they will destroy the entire ant colony. Simply apply the baits on their trails around the hot tub, and your problem will be resolved.

There are various ways of keeping ants away from your hot tub depending on the severity of the infestation:

  • The most common way to deal with an ant infestation in your hot tub is to maintain the condition of your tub. Unlike termites, carpenter ants do not eat their way through the wood. Instead, they build colonies in already wet or rotten wood. By keeping the wood dry and protected, you will prevent the ants from expanding their colony.
  • Another method is to use ant sprays. Ant sprays can drastically decrease the population of ants. If you choose to use a powerful spray, be sure to keep children and pets away as some of them can be quite toxic.
  • You can also create your own natural ant repellent at home to keep ants away from your hot tub.
  • Calling a professional exterminator is always the most effective option for getting rid of ants in your hot tub for good.
Ant Exterminators

In the following sections, we have gone in-depth about ants in hot tubs and ways to eradicate them. Besides, we also provided some product recommendations that will help you with your ant problem. If you are interested, then stay with us till the end. Let’s start!

Ants In Hot Tub| Information

Why Is My Hot Tub Infested With Ants?

There are several reasons why your hot tub is infested with ants. Ants love to nest in spa insulations due to their love for warm and moist environments. Particularly carpenter ants, these ants seek shelter in decayed and damp wood. 

Inspect your hot tub and look for any wooden areas that may need some repair and maintenance. If your hot tub is outdoors, look for any rotting or dead trees in the area around the hot tube and remove them.

You can also check for any food particles near the hot tub. Food is one of the main attractors for ants, therefore it is crucial to keep your hot tub and the area around it spotless and promptly clean up any spills, crumbs, or food debris.

Ants in Hot Tub Cover

Inspect the cover of your hot tub. Assure that the hot tub cover seals completely when you close it. Any openings or gaps will act as an entrance for ants in your hot tub. Especially if your hot tub is located in an outdoor setting, it is important to keep your hot tub sealed tightly.

Ants Under Hot Tub Cover

Ants that appear under the hot tub cover could be an indication that the hot tub cover was not sealed entirely or that there is another entrance for ants to enter the hot tub. Be sure to inspect if there are any holes or leaks in the pipes that may allow ants to come in and out.

Ants In Hot Tub Jets

If you spot ants in your hot tub jets, there is a possibility that there is a hole or a leak in your hot tub insulation. Carefully inspect your hot tub to look for any potential areas that ants might be able to enter through.

Is It Dangerous To Have Ants In Or Around A Hot Tub?

Ants In Hot Tub

While ants do not pose much danger to your health, they can be detrimental to the integrity of your hot tub. Ants may severely damage your hot tub cabinets or insulation if the infestation is left untreated.  While the damage can range from minor to severe, the repairs and maintenance may be very costly if the infestation is not treated as soon as possible.

How To Get Rid Of Ants In Hot Tub: Step By Step Instructions

The combination of wood and water is what makes hot tubs a great shelter area for ants to build their nests. To the ants, the spa insulation is a perfect nesting place. Although ants are not a fan of water, they can still live in or around your hot tub even when your hot tub is in use.

If the infestation is left untreated, ants might end up causing detrimental damage to both the interior and exterior of your hot tub. This is why you have to do something about this problem. The following is our ant control guide.

Step 1: Hot Tub Inspection

Carefully inspect your hot tub and look for any indications of an ant infestation. Look for holes or gaps around and in your hot tub as those are the areas where the ants may be entering or leaving.

If you are unable to see them from the outside, make sure to inspect the interior of your hot tub as well since the colony of ants and nest will most likely be located inside of the hot tub.

Step 2: Insecticide | Liquid, Powder, Ant Baits

Once you inspected your hot tub, you can apply insecticide. Insecticide comes in different forms such as sprays, powders (dust), and ant baits. Make sure to wear protective equipment prior to the application and keep pets or children away when using insecticides to treat the ant infestation.

Insecticide Dust

If you decide to use a powder insecticide be sure to distribute the powder or dust evenly around the hot tub and at the entrance of the ant colony. Ants that come in contact with the insecticidal powder will carry it on them and will additionally later poison the other ants.

Reapply the powder when needed if your hot tub is located outdoors as the rain or wind may wash or blow the powder away. Our recommendation for the ant dust is Delta Dust Multi Use Pest Control Insecticide.

Delta Dust Multi Use Pest Control Insecticide Dust, 1 LB
  • Delta Dust Bed Bug Insecticide - 1 lb.
  • Yield: 1 lb. of Delta Dust covers about 2,000 sq.ft.
  • Target Pest: Ants, Bed Bugs, Boxelder Bugs, Cockroaches,...
  • Active Ingredient: Deltamethrin, 0.05%
  • Cannot ship to NY or CT.

Insecticide Ant Spray

If you choose to use a liquid insecticide, spray it directly at the entrance of the colony and on their trails. These sprays work immediately and will eliminate ants on the spot. Sprays like Ortho Home Defense (for outdoor use) or Hot Shot HG-4480 (for outdoor and indoor use) work really well against ants.

Ortho Home Defense Insect Killer for Indoor & Perimeter2: With Comfort Wand, Kills Ants, Cockroaches, Spiders, Fleas & Ticks, Odor Free, 1.1 gal.
  • Ortho Home Defense Insect Killer for Indoor & Perimeter2 with...
  • KILLS BUGS INSIDE: Kills those annoying home-invading insects,...
  • KEEPS BUGS OUTSIDE: Creates a bug barrier that will kill bugs you...
  • NO STAINING OR STINK: This spray can be used indoors and out,...
  • WAND MAKES APPLICATION EASY: The Comfort Wand eliminates hand...
Hot Shot Ant Killer Plus Aerosol, Unscented, Kills On Contact
  • KILLS A VARIETY OF ANTS: Kills Argentine, southern, field,...
  • KILLS ON CONTACT: Hot Shot Ant Killer Plus aerosol kills on...
  • ALSO KILLS COMMON HOUSEHOLD INSECTS: Also kills cockroaches,...
  • FOR INDOOR AND OUTDOOR USE: Spray Hot Shot Ant Killer Plus both...
  • AEROSOL SPRAY: This water-based, unscented formula leaves no oily...

Ant Baits

Ant baits are straight up the best choice. Most of the baits commonly contain borax as the active ingredient. Borax is an effective and inexpensive way to treat ant infestations. Worker ants will take the bait and bring it back to the colony, where other ants including the queen will consume the bait and slowly die.

After several days, there will be a drastic decrease in the number of visiting ants. Ant baits like TERRO T300B Liquid Ant Bait (indoors) and Amdro Ant Block Granule (outdoors) work effectively in baiting ants.

TERRO T300B Liquid Ant Killer, 12 Bait Stations
  • Attracts & Kills – Kills common household ants including...
  • Kills the Ants You See & the Ones You Don't – As worker ants...
  • Works Fast – You should see a significant decrease in the...
  • Ready to Use – Place the bait stations, watch it attract ants,...
  • Use Throughout Your Home – Place stations near areas where...

Do not use ant baits with other forms of insecticides in the same area as the other types of insecticides will repel the ants away from the ant bait. If you choose to use both methods, be sure to use a non-repellent insecticide along with the ant bait.

Step 3: Aftermath

After the application of insecticides, be sure to keep children and pets away from the hot tub. If your hot tub is indoors, make sure the room is well ventilated.

If the infestation problem persists, it is recommended that you call a professional pest control service to resolve the issue. Click on the following link to find the best ant exterminators in your area.

How to Get Rid of Ants Around a Hot Tub

If you spot ants around your hot tub, identify and locate where they may be coming from. Especially if your hot tub is outdoors as ants tend to travel distances. Check to see if the nest is located inside the hot tub or outside somewhere in the close proximity.

If your hot tub is located outdoors, clean up any rotting logs, food traces, or any attractors that may draw ants around your hot tub. You can also apply insecticides in the forms of sprays, powders, or ant baits to eliminate them.

If your hot tub is located indoors, assure that the room and space around your hot tub are free of food or debris to prevent ants from visiting. You may use insecticides labeled for indoor use around your hot tub.

How to Get Rid of Carpenter Ants in a Hot Tub

How to Get Rid of Carpenter Ants in a Hot Tub

Carpenter ants may appear in your hot tub if your hot tub has any rotting or damp wooden infrastructure. To get rid of carpenter ants in your hot tub, make sure to regularly maintain the wooden parts of your hot tub. Replacing any rotting wood and covering them in a protective coating will protect your wood and prevent carpenter ants from damaging your hot tub.

If your hot tub is located outdoors, inspect if there are any rotting logs or trees nearby that may cause carpenter ants to appear. If your hot tub is located indoors, be sure not to have any wooden areas of your hot tub wet or damp to prevent carpenter ants from excavating the wood.

You can opt to use insecticides labeled for either indoor or outdoor use depending on the location of your hot tub to get rid of carpenter ants (read the above guide).

Related: How to Get Rid of Carpenter Ants Without an Exterminator

How to Keep Ants Away From Hot Tub: Prevention Guide

By taking preventative measures to keep ants away from your hot tub, you are saving yourself both a lot of time and money.

To keep ants away from your hot tub, make sure to regularly check the condition of your hot tub. Check for any leaks or holes in your hot tub insulation. Even the smallest gap or hole in your insulation will allow ants to crawl in and out of your hot tub. Repair and seal off unwanted openings to prevent ants from entering.

Look for any rotting or dampness in the wooden parts of your hot tubs. If you see any signs of rotting, switch out the wooden parts, or call a professional to do it for you. Keep the wood as dry as possible and seal the wood with a protective coat.

Lastly, keep the hot tub and the area around it clean. Remove any traces of food and wipe away any spills that may attract ants.


If you believe that your hot tub has an ant infestation, make sure to follow our guide in order to effectively and safely eliminate the ant infestation in your hot tub. It is best to deal with the ant infestation as soon as possible rather than later to avoid any damages and costly repairs on your hot tub.

Ants reproduce at an extremely rapid rate. Therefore, it is highly important to identify and locate the nest(s) to prevent them from spreading through your garden and house.

The best way to prevent an ant infestation in your hot tub is to keep it well-maintained and to regularly check for potential attractors of ants. Be sure to follow our site for more pest-related content!

List of Sources

Ants, University of Minnesota Extension

Rust M.K. & Choe D.H., Pests of Homes, Structures, People, and Pets, University of California, Agriculture and Natural Resources

Palmer A., Tips for Humane, Nontoxic Ant Control, People for the Ethical Treatment of Animals (PETA)

Potter  M.F., Ant Control for Householders, University of Kentucky, College of Agriculture, Food and Environment

Potter M., Carpenter Ants, University of Kentucky, College of Agriculture, Food and Environment