The Top 8 Best Hot Tub Defoamers Reviews for 2020

After a long week or a long day, you probably look forward to taking a dip in the hot tub more than anything. You put on your swimsuit, your sunscreen, but arrive at the hot tub only to find an unsightly layer of foam sitting at the top. Even though the water beckons you to come and take a dip, the foam turns you off to the idea.

The top layer of foam on a hot tub is inevitable. Over time, chemicals and dirt in the water mix to create a foam which neither looks or feels pleasant to sit inside. Luckily, there are anti-foaming chemicals - or defoamers - made to tackle this specific problem and let you sit in a hot tub free of foam and germs.

Because there is a whole slew of different hot tub defoamers out on the market, we've compiled a list of the best picks.

Top 8 Hot Tub Defoamers in 2020 Review

Overview:


Leisure Time's defoamer is an effective and simple-to-use product that works with sanitized hot tubs for a clean and bright spa environment.


The foam suppressant doesn't have an oily feel and doesn't interact negatively with chlorine, bromine, ozone, or biguanide sanitizers.


 All you have to do is shake well, flip open the lid, and apply directly to the foaming area at 1/2 an ounce at a time.

Pros

  • Works immediately
  • Only need to apply a little bit at a time
  • Compatible with nearly any type of sanitized hot tub

Cons

  • Doesn't last more than 24 hours
  • May make your water cloudy

Overview:

This concentrated defoamer is a powerful antidote to the buildup of foam caused by chemicals, oils, and products coming off the skin. It uses a water-based silicone formula that doesn't leave any oily residue behind and works with both chlorine and saltwater pools.


You'll need to use about one or two ounces, but it eats away at the foam immediately and clears up the water fully in less than an hour.

Pros

  • Made in the USA for no foreign chemicals
  • Leaves water completely clear
  • Works with hot tubs of any water chemistry

Cons

  • Must leave jets on to mix the defoamer and water
  • Not the safest to leave in an enclosed hot tub

Overview:

If you're looking to get more defoamer for the same price as the average big-name brands, this is one of your best options.


You'll have to use an ounce per every 100 gallons to treat your hot tub adequately, but there will be more than enough in your bottle to allow you to do so. Plus, this defoamer is effective for days and sometimes even weeks before you need to apply it again.


To use this defoamer, you'll need to handle the process a bit more carefully. According to the manufacturer's instructions, you'll need to run your hot tub for 30 seconds, turn it off, apply the defoamer when the water is still, and turn the hot tub back on again.

Pros

  • Lasts days and sometimes weeks
  • You get more in one bottle for the same price as other brands
  • Clears up larger pools just as effectively as smaller ones

Cons

  • The process of using this product will take about a minute
  • May give your water a thicker feel

Overview:

For a defoamer explicitly designed for hot water application, this might be the solution you need to get your hot tub fix. You get two pint-sized bottles in the package and even though the instructions state you'll need three ounces to do the trick, a smaller sized area, like a 250-gallon tub - will only need one.


After shaking well, all you have to do is apply the defoamer directly onto the foam, and it works rapidly to eliminate the build-up and give you results you can see clearly.

Pros

  • You can use less than recommended with the same effectiveness
  • Clears water instantly
  • You get two bottles for the price of one

Cons

  • Only lasts for about an hour
  • May leave a sticky residue on the inside walls of your hot tub

Overview:

The Spa Essentials defoamer is one of our recommendations because it's incredibly straightforward to use. Just one squirt from the pint-sized bottle clears up a foamed-up surface and keeps your hot tub at bay until your foaming problem is looked at by an expert.


Aside from keeping your water looking sparkly-clean, it lasts for a while before you need to reapply the product.

Pros

  • You only need a squirt to do the job
  • Effects are long-lasting
  • Keeps the clarity of your water pristine

Cons

  • The manufacturer lists no precise amount to use

Overview:

The HTH defoamer provides not only the necessary foam removal that you're looking for but contains vitamin E formula for maintaining the health of your skin.


There's no bad odor, no foreign chemicals since it's manufactured in the USA, and eliminates foam in less than half a minute. You'll need to use an ounce about every 200 gallons, and the foam should clear right up.

Pros

  • Odor-free
  • Works in under 30 seconds
  • Contains vitamin E

Cons

  • May need to add just a tad more to get rid of foam completely

Overview:

This defoamer by Hot Tub Things is on our list because it works like magic. Just a capful of the defoamer poured onto the surface of circulating water breaks up any existing foam instantly and clears your hot tub in only a couple of minutes.


Hot Tub Things manufactured this defoamer exclusively for hot tubs, and the product is safety tested, meaning you're getting a solution made to work.

Pros

  • Only a cap-full does the trick
  • The solution is safety tested
  • All foam disperses in minutes

Cons

  • Doesn't work well when applied in still water

Overview:

For the last product on our list, In The Swim comes in with a quart-sized bottle of defoaming solution that goes a long way.


Just a cap-full or an ounce for every 500 gallons will get the job done to eliminate surface in hot tubs that use either chlorine or bromine.


It'll only take 10 minutes to see whether or not the foam stays away definitively, but as long as you don't put in more of the solution than needed, the hot tub should remain clean.

Pros

  • Small doses and a big bottle means this product will last you a long time
  • Works immediately and you won't need to wait more than 10 minutes to determine whether if foam will come back
  • Compatible with chlorine and bromine hot tubs

Cons

  • The product is designed for maintenance only and will only last for one or two days
  • Going over the recommended dose may cause issues

Types of Defoamers

When picking out the defoamer right for you, you might want to consider the type of defoamer that you're purchasing. Depending on what's easiest to use and what you may be sensitive to, you mustn't select a defoamer that you know will be unpleasant to your preferences.

Oil-Based

Oil-based defoamers use vegetable or mineral oil to break down and dissolve the foam on the surface of your hot tub. These types often contain a bit of wax to strengthen their performance. The oils in oil-based defoaming products are insoluble with the foaming medium and may come with any kind of oil except silicone oil.

Water-Based

Water-based defoamers contain oil as well but are mostly made with water to eliminate the oily feel and reduce the chances of a greasy residue. While the water does not break down the foam on its own, it keeps the foam from spreading after the oils and waxes have broken the foam down.

Silicone-Based

Silicone-based defoamers contain silicone oil and hydrophobic silica, which means it repels water and busts down the bond between the water and the foam on the surface of it. These types of defoamers often come in water-based emulsifiers to ensure that the foam doesn't come back once it's broken up. Silicone-based defoamers dissipate foam with ease and are some of the most effective types of defoamers to use.

Powder Defoamers

Powder defoamers are dry defoamers in powder form, which combine with other products to work the most powerfully. When mixing a powder defoamer with liquid detergent or pool cleaner, a defoaming powder product will get rid of the foam in the most effective way that it can.

While not all defoamers are the same, hopefully, knowing what type you're looking for helps you narrow things down. If not, our list should give you a starting off point. You deserve to be able to enjoy a moment of relaxation in your hot tub without worrying about scooping out foam; just remember, always to read the instructions to get the cleanest water possible for a comfortable soak!