Both chlorine and bromine are excellent pool disinfectants. Because bromine is more stable at high temperatures, it's a great choice for spas and hot tubs; Chlorine disinfectant, with its rapid disinfection effect and low cost, is more suitable for most regular swimming pools. In addition, bromine produces less odor and irritation than pool chlorine. This article compares their effectiveness, stability, odor, skin sensitivity, temperature performance, and cost to help you choose the best sanitizing solution for different pool and hot tub conditions.
| Products |
 |
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| Type | Pool Chlorine | Pool Bromine |
| Pros | + Due to wide sterilization spectrum, it can effectively kill a variety of microorganisms + Fast disinfection effect + Easy to use + Low price + Stable when exposed to UV rays + Suitable for regular swimming pools |
+ Little smell + No skin irritation (without chloramines) + It can maintain good bactericidal effect even at high temperature + It is not affected by pH, ammonia nitrogen and CYA levels |
| Cons | - Strong smell of chlorine - Chloramines can cause eye or skin irritation when swimming pools are poorly maintained - Long-term use will increase CYA levels (if stabilized chlorine is used) |
- Higher cost - More likely to cause allergies and skin irritation - Bromine is not stabilized by CYA, so it cannot be used in outdoor swimming pools |
Swimming pool maintenance not only needs to clean the debris of the pool and replace the pool water, ensuring that the water quality meets the sanitary standards to prevent the breeding of bacteria and viruses is also crucial. Choosing the suitable disinfectant plays an important role in maintaining the pool water quality.
What is Pool Chlorine?
Chlorine disinfectant is a class of chemicals containing chlorine preparations, mainly including sodium dichloroisocyanurate (SDIC), trichloroisocyanuric acid (TCCA), calcium hypochlorite (CHC), etc., widely used in swimming pool water treatment. When dissolved in water, these disinfectants produce hypochlorous acid that kills microorganisms, thus achieving disinfection effect. Pool chlorine, especially SDIC disinfectant, has become the primary choice for pool disinfection because of its high efficiency and broad spectrum bactericidal ability.
What is Pool Bromine?
Bromine disinfectant is also an excellent swimming pool chemical, because of its mild and long-lasting disinfection effect, it also has a good performance in pool maintenance. Compared with chlorine disinfectant, pool bromine has a lower odor and can maintain a stable bactericidal effect at high temperatures, so it is used in spas and hot tubs. Bromochlorodimethylhydantoin (BCDMH) is a common bromine disinfectant used in sanitizing pool water.
Bromine vs. Chlorine: What is the Difference?
Physical Form
Chlorine disinfectants come in several forms, including granules, tablets, powders and liquids, such as SDIC, TCCA, CHC, etc. BCDMH is usually in a form of white tablets. For this class of water treatment chemicals, we can customize the mesh, size and gram weight according to customers' requirements to meet a variety of different needs.
Usage
When using chlorine granules, it is necessary to dilute them in a certain proportion and then add them to the pool water. For chlorine and bromine disinfectants in tablet form, put them in a feeder or dispenser to slowly dissolve them into the water and then flow into the pool.
Application
For regular swimming pools, chlorine disinfectants are popular because of their low cost and simple operation. However, in spas and hot tubs, chlorine disinfectants may accelerate decomposition due to high temperatures, resulting in reduced disinfection effect. At this time, bromine disinfectant with good stability and durability is a good choice. Because CYA does not stabilize bromine, bromine disinfectant should not be used in outdoor swimming pools.
Shocking Procedure
Swimming pool shock, that is, add a large number of disinfectants to quickly improve the disinfection effect in a short time. Using chlorine disinfectants (SDIC or CHC) to shock the pool can quickly increase the available chlorine in the pool, thereby killing bacteria, viruses, algae and other microorganisms. In contrast, bromine disinfectant dissolves slowly, that is, it cannot be used for shock treatment.
More details can be found at: How to Shock a Swimming Pool Properly
Sun Exposure and High Temperatures
If you have an outdoor pool, direct sunlight is unavoidable. Both chlorine and bromine decompose easily under UV light. SDIC and TCCA, as stabilized chlorine, contain cyanuric acid (CYA) that is pool stabilizer and conditioner, can maintaining the disinfection and sterilization effect of chlorine in swimming pools. Unlike chlorine, bromine is not stabilized by CYA and therefore it cannot be used in outdoor swimming pools. However, bromine is stable at high temperatures, which makes it a good option for hot tubs and spas.
Costs
Bromine disinfectant is much more expensive than chlorine disinfectant. At the swimming pool store, 50 pounds of chlorine sells for $260, while 50 pounds of bromine sells for $405.
Conclusion
In the end, both chlorine and bromine disinfectants have advantages and disadvantages. You need to make a comprehensive consideration based on the specific needs of the pool. In addition, regular testing of water quality, reasonable control of the amount of disinfectant and other water treatment measures are also indispensable links in pool maintenance. If you have a need for swimming pool and spa chemicals, please feel free to contact us.