Why Does My Hot Tub Foam?


There are a few different reasons why your hot tub may be foaming.

Firstly, it could be because you have high levels of stuff dissolved in your water, such as soap residue, body oils, or lotions.

These can all create foam when they interact with the moving water in your hot tub. 

Secondly, it could be because you have higher than normal levels of alkalinity or calcium in your water.

Both of these can also cause the foam to form.

Thirdly, it could be that you need to adjust the pH levels in your hot tub; if they’re too low or too high, this can also lead to foaming. 

If you’re not sure what the problem is, the best thing to do is to bring a sample of your water to a local hot tub dealer or pool store, and they can test it for you and recommend the best course of action.

In most cases, though, a simple water change and some adjustments to your pH levels should fix the problem.

How Do I Stop My Hot Tub From Foaming?

There are a few things you can do to help reduce the amount of foaming in your hot tub: 

  • -Limit the amount of bubble-producing products you use. This includes soaps, shampoos, and bathing oils. 
  • -If you must use these products, be sure to completely rinse them off before getting into the hot tub. 
  • -Avoid using Dawn dish soap as it is known to produce a lot of foam. 
  • -Use affected areas only and avoid scrubbing hard surfaces with a Bristle Brush as this can cause even more foam. 
  • -There are commercial defoaming agents available that can be used according to package directions.
  • -Oscillating nozzles can also help to reduce the amount of foam in your hot tub. These can be attached to your existing nozzle and will help to break up the bubbles before they have a chance to form. 

If all else fails, you may need to drain and refill your hot tub with fresh water. This will reset the chemistry levels and should help to reduce the foaming problem.

What Causes Excessive Foam In A Hot Tub?

One possible cause of excessive foam in a hot tub is that the water is not properly chlorinated.

When the chlorine levels are low, it can cause bacteria to grow and produce scum or foam.

Another potential cause of excessive foam in a hot tub is too much soap or detergent.

If there is too much soap or detergent in the water, it can form bubbles and result in foaming.

Finally, another possible reason for excess foam in a hot tub is that the water is over-softened.

If the water has been softened excessively with salt or chemicals, it can lead to more foaming.

How Do You Get Rid Of Foam In A Hot Tub Naturally?

There are a few things you can do to get rid of foam in a hot tub naturally. One is to adjust the pH level of the water.

If the pH level is too high, it will cause the foaming agent (soap) to work overtime and produce more foam.

You can also try adding an enzyme product that breaks down the organic material that causes foam.

And finally, you can try using a clarifier to help suspend the organic material so that it’s easier to remove.

The best way to get rid of foam in a hot tub naturally is to use an enzyme-based foam control product.

Enzyme-based foam control products work by breaking down the sudsing agents that cause foam.

They are safe for use in hot tubs and spas, and they are also biodegradable so they will not harm the environment.

Why Does My Hot Tub Foam Up When I Turn On The Jets?

Your hot tub may foam up when you turn on the jets for a variety of reasons.

One possibility is that there may be something in the water that’s causing the foaming, such as soap residue or algae.

Another possibility is that the jets themselves could be dirty and need to be cleaned.

There are a number of ways to clean hot tub jets, but one simple method is to pour white vinegar into a bucket and then use an old toothbrush to scrub the jets with the vinegar solution.

If your hot tub continues to foam up after cleaning the jets, you may need to add a product specifically designed to prevent foamings, such as citric acid or polyquat-based anti-foam agents.

You can typically find these products at your local pool or hot tub supply store.

If your hot tub is foaming up and you’re not sure why the best course of action is to take a sample of the water to your local pool or hot tub supply store for testing.

They will be able to determine what’s causing the problem and recommend the best course of action to take.


  • Jason

    Jason is an experienced writer, having contributed to many popular websites over the years. He currently writes for Big Hot Tub, a blog about everything hot tubs. When he's not writing or working on his blog, Jason enjoys spending time with his wife and two young children.