Hot Tub Salt

Click here to receive our Free Salt Water Pool Newsletter!

Hot tub salt is the magic behind creating luxuriously soft water and with dead sea mineral salts you can take hydrotherapy to the next level.  If you are in the market for a new hot tub or upgrading to a salt water system you'll have a better understanding of how salt works to keep your hot tub sanitized and what options are available when it comes to choosing the best salt. 

hot tub salt

There are a number of different options when considering salt for your spa or hot tub and to make it more confusing the same product is marketed under multiple brand names.  It's important to know what types are safe and the ones you shouldn't use because they could cause damage to the electrode plates in the chlorinator.

There are a few products you should avoid like common table salt, rock salt or ice melt as they often contain anti-caking compounds that are added during processing.  These impurities will add unnecessary contaminants to your hot tub and in extreme cases it could cause damage to the hot tub salt water system

The good news is that there are salt products that are specifically designed for use with salt systems and even some that can be used with even more benefits.  There are a few important things you will need to know when using hot tub salt alternatives and we'll discuss it below but first lets take a look at what you should look for when choosing a salt.  


Hot Tub Salt Specifications

In any hot tub or pool you never want to add a product that isn't pure or has additives from the manufacturing process.  If you add something foreign to your hot tub it can affect the chemistry and can often lead to balancing issues, staining and other problems.  

You want to look for at least 99.8% pure, evaporated, granulated and non-iodized salt.  The safest way to purchase salt is to find a product specifically made for hot tubs or pools because it provides the reassurance that the product is pure and hasn't been altered during processing.  If you have a salt water pool you can use the exact same pool salt with the same benefits that you experience in your pool.  

If you want to try something different than regular pool salt there are countless hot tub owners that use dead sea minerals for the therapeutic qualities including relief from psoriasis, eczema and acne.  Your hot tub will be turned into a safe and natural alternative to treating various skin conditions while being low maintenance and more affordable to operate.


Hot Tub Salt vs Dead Sea Minerals

If you are in the market for hot tub salt you probably have some questions about what dead sea minerals are and if it's the right product for you.  The cost for regular pool salt is similar to dead sea minerals and the added benefits make them even more appealing.  The benefits of using dead sea salt minerals to regular salt include:

  • relief of skin conditions in up to 90% of users including psoriasis, eczema and acne
  • detoxifying, softening and cleansing properties
  • experience smoother and softer skin
  • aromatherapy and relaxation to ease tension 
  • natural relief of aches and pains

The benefits that dead sea mineral salts provide make them worth serious consideration.  Even if you don't have sensitive skin there is no doubt you will notice the difference but there are few things you need to know if you decide to use them in place of regular hot tub salt.  

The dead sea minerals have a higher conductivity than regular pool salt so you will often get a salinity reading displayed that is higher than recommended.  This could be in the form of a high salt warning on your device or a prompt to add salt but even when you see a high salt reading you probably don't need to add salt and your hot tub chlorination is running smoothly.

The best way to double check that you have the right amount of salt is to confirm the amount of free chlorine.  This can be done by using a simple salt water test kit that will provide an accurate reading of the chlorine and other chemical properties in your hot tub.  As long as your chlorine production is adequate you can ignore the high salt reading when using dead sea minerals. 


Adding Salt to your Hot Tub

After you have decided which salt you are going to use you will need to know how much salt to add.  The hot tub salt calculator below will help you determine the appropriate amount of salt to add based on the currently salinity of your water and desired salinity for your specific size of hot tub.

It's a good idea to add salt in increments and let it dissolve completely over several hours in between testing the salinity as you go.  It can be time consuming and frustrating if you add too much because the only way to lower salinity is to empty water from your tub and add fresh water. 

When using the calculator below to determine how much salt to add to your hot tub you will first need to determine how many gallons of water your tub holds.  The next step will be to test the salinity before adding any salt because your water could already have salt in it. 

Hot Tub Salt Calculator

As an example we can determine that a 500 gallon hot tub that has an existing salinity of 0 will require 10.4 lbs of hot tub salt or dead sea minerals.  That same hot tub would only require 8.4 lbs of salt if the existing salinity was already around 500 ppm.  

hot tub salt calculator

After you've added the appropriate amount of salt and balanced your other levels it's time to place the generator in your tub and start enjoying. 


SWPS Home Page > Salt Water Hot Tub