How Many Bromine Tablets To Put in a Hot Tub?


Adding bromine tablets to your hot tub is an important way to ensure it’s clean at all times. However, there are various amounts of bromine tablets that need to be added depending on the type of tub you have. 

When it comes to hot tubs, there are all types of sizes they can come in. For starters, there are 150-gallon hot tubs and hot tubs holding up to 450 gallons. And, with the differences in size, come the differences in cleaning solutions that need to be added. 

Bromine tablet usage will vary based on the tub type. For example, there are the recommended bromine tablet amounts for various tub sizes:

  • 150 to 200 gallon spas: 2 bromine tablets
  • 200 to 300 gallon spas: 3 to 5 bromine tablets
  • 300 to 450 gallon spas: 4 to 7 bromine tablets

However, if your spa has any imbalances, you can add more bromine tablets based on the issue. For instance, if your chlorine levels are less than 1.0 and your bromine levels are 2.0 or less, then you can add 1 teaspoon to 2 teaspoons of bromine, depending on your hot tub’s gallon size. 

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Frog Products / Google Stock Images

How Long Does It Take Bromine Tablets To Work?

When you are adding bromine tablets to your hot tub, it will take a few weeks for them to dissolve and be effective. This time will vary based on the amount of times your tub’s water is drained and your spas bromine bank. 

It’s worth noting that in order for bromine tablets to be effective over time, you must start out by building a bromide bank in your hot tub. This can be done by adding small amounts of sodium bromide each time you empty and refill your hot tub. 

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Outside in Leisure / Google Stock Images

What Happens if You Put Too Much Bromine in a Hot Tub?

Ensuring that you add the proper amounts of bromine in your hot tub is very important. Many need to understand that there are some side effects on your body if you overuse bromine. If there are high bromide levels in your hot tub, it will likely be uncomfortable to sit in and enjoy. 

If you put too much bromine into your hot tub, then those enjoying your hot tub could experience skin irritation, itchy eyes, and even some light respiratory breathing problems. High levels of bromine can in fact affect a person’s lungs in a negative way, which is why it’s important to properly add an ideal range of bromine in your hot tub. 

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Research Features / Google Stock Images

Can I Just Throw a Bromine Tablet in My Hot Tub?

If you are using bromine tablets in your hot tub, then it’s ultimately for cleaning your tub and ensuring that ph levels are maintained. In order to do so, bromine tablets are used. And, utilizing these tablets in a hot tub varies from how they are used in a pool. 

Generally, these tables aren’t thrown into your hot tub, they must be correctly incorporated into your hot tub’s water filtration system. Bromine tablets can be placed in your hot tub’s floating dispenser or skimmer basket and should be kept separate from any other types of cleaning tablets used. 

Bromine tablets will work best if they are added to your tubs of water like this. Sometimes these tablets take longer to dissolve than that of other cleaners, and placing them directly in the tub isn’t as effective.