My Struggle With: How to Lower Bromine in Hot Tub

Having issues with high bromine levels in your hot tub? Learn how to lower bromine in hot tub safely and effectively. Methods include using bromine neutralizers, shocking the tub, allowing bromine to dissipate naturally, diluting the water, and using reducing agents. 

What is Bromine?

  • Chemical Sanitizer: Bromine is a halogen, a chemical element similar to chlorine, used to disinfect hot tubs by killing bacteria, viruses, and other contaminants.
  • Forms: Bromine comes in tablets or granules that dissolve in the hot tub water.
  • Activation: You typically use a bromine feeder for tablets or add granules directly to the water. To activate bromine, you’ll also use a shock treatment (usually a non-chlorine oxidizer for bromine systems)

Why is Bromine Used in Hot Tubs?

  • Suitable for Sensitive Skin: It creates bromamines, which are less irritating to skin and eyes than the chloramines created by chlorine.
  • Less Harsh Odor: It generally produces a milder smell than chlorine.
  • Stable at High Temperatures: It remains effective in the warm water of a hot tub better than chlorine, making it a good choice for this environment.

I’ve been having some issues with my hot tub lately. I don’t know why the bromine levels have been reading higher than usual. As a hot tub owner, maintaining safe and comfortable water chemistry is one of my top priorities.

High bromine levels can cause irritation for bathers and damage the tub over time. I want to get my bromine down to the ideal range, but I want to do it in a natural way that’s not harsh on my hot tub or my skin.

Understanding: How to Lower Bromine in Hot Tub

Bromine and chlorine are the primary sanitizers used in hot tubs. It supports kill bacteria and algae, keeping the water clean. The recommended bromine level is 3-5 parts per million (ppm). However, my tub’s bromine was recently tested at 8-10 ppm.

High bromine can be caused by several factors:

  • Too much bromine added
  • Low pH levels
  • High temperatures or sunlight exposure
  • Lack of shock treatment
  • The buildup of organic contaminants

Prolonged high bromine can cause eye and skin irritation, faded or damaged hot tub spa covers, jets, and corroded metals. It’s essential to lower the levels to avoid these issues.

My Options for Reducing Bromine

Using a Bromine Neutralizer

bromine neutralizer quickly brings down bromine levels. It contains sodium thiosulfate, which reacts with bromine to form harmless byproducts. However, it doesn’t address the root cause of the high bromine.

Shocking the Water

Shocking with either chlorine shock or non-chlorine oxidizes contaminants and burns off excess bromine. It helps reset bromine to an ideal level. I’ll need to test and adjust as needed after shocking.

Letting the Bromine Dissipate

I can stop adding bromine and allow the high levels to naturally decrease over 5-7 days. This passive method is gentle but can take some time. I may need to add a clarifier to prevent cloudy water.

Partially Draining and Refilling

Partially draining the tub and refilling it with fresh water is an aggressive way to dilute the bromine. This is effective but wastes water and chemicals.

Using Reducing Agents

I can use sodium thiosulfate product to chemically reduce bromine levels. However, it’s best to rely on these reducing agents sparingly.

Lower bromine levels without relying on chemicals:

1. Natural Breakdown and Evaporation

  • Leave the Cover Off: Remove the hot tub cover and let the water sit undisturbed for an extended period (a day or two). Sunlight and air exposure will help bromine dissipate naturally.
  • Run the Jets: Turn on your jets for a while to increase aeration and accelerate the bromine breakdown process.

2. Dilution

  • Partial Drain and Refill: Drain a portion of the hot tub water (around 25-50%) and replace it with fresh water. This directly lowers the concentration of bromine in your hot tub.

3. Wait It Out

  • Patience is Key: If time is on your side, bromine levels will naturally decline over a few days. Simply avoid adding more bromine sanitizer during this period.

Important Considerations

  • Testing: Always test your bromine levels before and after using these methods to track your progress.
  • Safety: Do not use the hot tub if your bromine levels are significantly higher than the recommended range (3-5 ppm).
  • Sunlight: Sunlight exposure speeds up the process by breaking down the bromine.

When a Little Chemical Help May Be Needed

  • Sodium Thiosulfate: If your bromine levels are extremely high or you need to lower them very quickly, you can use a small amount of sodium thiosulfate, a bromine neutralizer. Follow the product instructions very carefully.

My Plan of Action

After researching, I’ve decided to use sodium thiosulfate first to lower my high bromine levels. Once the levels drop closer to 5 ppm, I’ll shock the tub to help “reset” the water and burn off contaminants.

Going forward, I’ll be more careful about monitoring bromine levels and adjusting the pH if needed. I may switch to chlorine because it seems less prone to climbing too high.

The key is staying on top of my hot tub’s water chemistry. I plan to get my bromine levels back to normal soon with some adjustments. Hot tubbing should be relaxing – not a source of irritation!

How to Lower Bromine in Hot Tub
Image source: Aquadoc chlorine

Sodium bisulfate and liquid muriatic acid are great solutions to lower it. You need to dilute the acid solution with water and pour it into your hot tub water. You can use a pH test kit to check the water level and add the appropriate amount of acid solution. Then, you can enjoy your relaxing time in the hot tub.

Discover the surprising benefits of baking soda for your hot tub! Learn how to use it to keep your spa clean and maintain pH balance.

Baking Soda Will Help The Water Ph Drop More Comfortably

If you have high alkalinity, it is essential to lower it immediately. High alkalinity can cause bacteria and algae growth, which will lead to green water and other problems.

A simple solution to lower the pH level is to add some baking soda to the water. The baking soda will help the water’s pH drop more comfortably. Besides, it will also remove the toxins in your water.

Lower Alkalinity Without Chemicals

Having high alkalinity in my hot tub was causing scaling and cloudy water. I wanted to lower it naturally without adding harsh chemicals. Here are four practical ways I used to reduce alkalinity without chemicals:

  • Diluting the water – I drained some water out of the tub and added fresh water to dilute the alkalinity. This brought levels down quickly.

    Using baking soda – Adding small amounts of baking soda can gradually raise alkalinity over time through buffering.

    Using white vinegar – It is a mild acid that reacts with alkalinity. I added small amounts and tested frequently.

    Using citric acid – Powdered citric acid from the grocery store effectively reduces alkalinity. I added half a teaspoonful until the level was ideal.

    This method is acceptable, BUT it’s crucial to remember it will also temporarily lower your pH. Monitor pH closely and adjust as needed.

With some trial and error using these chemical-free methods, I successfully reduced the high alkalinity in my hot tub. No harsh chemicals are needed!

For additional information, visit Hot Tub Patio, or if you’re interested in more reading, see our Guides.

Balancing Act:

I’ll use muriatic acid if the natural methods need to be fixed. My next step is to start shocking the tub more often – experts recommend shocking weekly – to control alkalinity and keep the water balanced. Getting the chemistry right is crucial to prevent damage and keep my hot tub in shape.

2 Comments

  1. Dude man March 9, 2024
    • Sagheer March 9, 2024

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