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Can I put Epsom salt in my hot tub?

Author

Rachel Ellis

Published Jan 09, 2026

While Epsom salt in the bathtub is OK, hot tubs and Epsom salt simply aren't a good combination. Pure Epsom salt has acidic properties that can disrupt the pH balance and total alkalinity of the water in your hot tub, which can eventually cause your tub equipment to corrode.

How much Epsom salt do I put in my hot tub?

The average bathtub holds about 80 gallons of water. On the other hand, the average hot tub holds about 400-500 gallons. To reach the same concentration level in your hot tub would require 10-12 cups of pure Epsom salts. That's a lot of solids in the water!

Can you use Epsom salt in a spa tub?

In short, no. You should never put Epsom salts in either your spa or swim spa.

What salts can you put in a hot tub?

Our short answer is use magnesium sulfate (Epsom salt) rather than sodium chloride. Get all the benefits without destroying your hot tub. It works great in a Royal Spa hot tub.

Can I put bath salts in my hot tub?

However, Epsom Salt or Bath Salts do not have the same effect on your hot tub, and we do not recommend using them. Adding Epsom or Bath Salts to your hot tub will alter your water chemistry, it will raise your Total Dissolved Solids (TDS), and it can be highly corrosive and corrode your heater and pump elements.

31 related questions found

How can I make my hot tub smell better?

Some of the more popular choices of fragrances for adding to hot tubs include citrus-based and clean-smelling fragrances such as lemon oil, wintergreen or vanilla. Floral scents that are strong enough to stand up to use in a hot tub include lavender, sweet geranium and rose.

Does Epsom salt corrode pipes?

Will Epsom Saltwater Baths Cause Damage to My Pipes? Epsom salt has amazing restorative health benefits and are very unlikely to harm your home's plumbing system, so don't worry about the occasional salt-bath additives going down the drain. Your only concern should be for prolonged salt exposure in natural disasters.

Can you put Epsom salt in pool?

Do not use Epsom salt in an ordinary, chlorinated pool. Epsom salt will quickly corrode traditional filters and can cause other pool problems that will require the intervention of a professional.

Are bath salts bad for Jacuzzi tubs?

Plain bath salts offer the best potential for dissolving completely without harming the tub, but of any type of bath salt has potential to clog the inner workings of the whirlpool or even damage the pump if the jets are used with salts in the water.

Will Epsom salt damage Jacuzzi tub jets?

Using pure Epsom salts (without any added oils or fragrances) in a plain-water jetted bathtub can enhance the soothing effect of the water massage by adding additional healing properties. It is a safe, natural compound that will not damage your jetted tub's pipes, as long as you routinely flush the tub.

How do you ruin a hot tub?

6 Things that Destroy Hot Tubs and Swim Spas

  1. Leaving the Spa Dry after Draining. ...
  2. Excess Contaminants. ...
  3. Soaps and Bubble Baths. ...
  4. Using Pool Chemicals. ...
  5. Shutting Off the Spa. ...
  6. Keeping the Spa Uncovered. ...
  7. Contact Your Source for Affordable Hot Tubs in Fair Oaks for More Advice.

What can you not put in a Jacuzzi tub?

As a general rule, don't add bubbles, shampoos or soaps to a jetted tub. Only use bath products specially formulated for a spa, so that you don't clog the jets, pumps or motor with oils and other debris.

Can I put essential oil in my hot tub?

Essential oils aren't designed for use in hot tubs, so unfortunately they cannot be used inside a spa. These products can cause a myriad of problems to a hot tub's filtration system. Essential oils act the same way the oil that comes from our skin does, but more potent.

Are bath bombs bad for Jacuzzi tubs?

Bath bombs are safe to use in hot tubs given that they are used properly. If you're not careful, you can find yourself throwing away the thousands of dollars you used in buying the hot tub after a few reckless uses of fizzy bombs. Bath bomb bulk use can easily start to wear down your expensive hot tub.

Is pool salt and Epsom salt the same?

However, pool salt is not the same as some popular kitchen varieties. People use Himalayan salt, Epsom salts, Kosher salts, and other salts in their food, but these often have additives or minerals that give them their distinctive flavors and properties that are bad for pools.

Will Epsom salt keep water clean?

More importantly, however, Tim points out that 'there is little evidence or scientific proof to show that Epsom Salts acts as a disinfectant, which could leave harmful bacteria lurking in the paddling pool, even after cleaning has taken place.

Can you put chlorine in a salt pool?

Yes, a salt water pool is easier to maintain! There's no need to purchase, store and add chlorine to your pool. Simply add salt and your pool's salt chlorinator will do all the work of making chlorine.

Does Epsom salt hurt a septic system?

While Epsom salt doesn't cause damage to your septic tank, this doesn't necessarily mean you should go flushing it into your tank. Many individuals think flushing Epsom salt in their septic tanks will break down waste. While salts can unclog a toilet, the effect Epsom salt has on your septic system will be minimal.

Do bath salts clog drains?

When partially dissolved bath salts collect in your drain, they can mix with hair and other debris and cause major clogs. The same goes for the flower petals, glitter, and confetti in your bath bomb. In addition to potentially trapping you in the bathtub, bath oils can also clog pipes by congealing when they cool.

Can bath salts go down the drain?

It's another ingredient of the sludge that forms inside plumbing and causes clogs. Place hair strainers over drains. Bath salts. Unless the label specifically states that the product fully dissolves, assume that it doesn't and don't let it flow down drains.

Can you put baking soda in your hot tub?

You can use baking soda in your hot tub if its pH is too low. Baking soda can raise both the alkalinity and the pH of your hot tub and help it achieve the right chemical balance and stability. Its presence can also keep your tub from being cloudy.

Why does my hot tub smell fishy?

Your water can emit an odor if there's low levels of sanitizer, your pH is out of range, or there's bacteria or algae growth. For addressing this issue we will potentially need either dichlor chlorinating granules, pH Up, or pH Down.

Can any hot tub use salt water?

Any hot tub can be a saltwater hot tub with the addition of a salt chlorine generator. Instead of adding chemicals directly to your hot tub, you add salt (about two pounds per 100 gallons of water), which dissolves to produce natural chlorine that's needed to keep your hot tub clean.

What can you put in a hot tub?

You can use either chlorine or bromine. Master Spas does recommend using sodium dichlor granules, which dissolves more quickly and sanitizes the water quickly.

What is the ideal temperature for a hot tub?

The majority of hot tub users prefer a water temperature in the range of 100°F-102°F. 104°F is the standard maximum temperature, which some users also prefer. Always consult a physician before getting in the hot tub while pregnant.