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    Chlorine & Bromine

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    What are the Differences Between Chlorine and Bromine?

    At a Glance

    • Bromine can be reactivated
    • Bromine is better in warmer temperatures
    • Bromine costs more
    • Bromine is only available in 1” tablets
    • Chlorine can be raised easier
    • Chlorine needs conditioner or cyanuric acid
    • Chlorine breaks down permanently
    • Chlorine dissolves faster to begin sanitizing the water

    DO NOT mix Chlorine and Bromine

    There are Several Chlorine Options:

    Chlorine dissolves fast and almost instantly begins to sanitize your pool water.  Chlorine Tablets or Slow Dissolving Chlorine Sticks can be used in Floating Chlorinators, through an In-line Feeder, or via an off-line chlorine feeder.  Granular Chlorine can be dissolved into a large bucket of water and poured around a pool’s perimeter (always follow the product’s directions).  Liquid Chlorine is another option that offers affordable versatility for sanitizing your swimming pool. We do not recommend adding any form of In The Swim Chlorine directly to your skimmer because if it hasn’t dissolved properly it can be corrosive to your pool equipment.  Chlorine needs time to become diluted in your pool water before entering the filtration system.

    As chlorine sanitizes or kills algae it produces a compound known as chloramine. Chloramine is a chlorine molecule that has combined with Ammonia or Nitrogen and produces the familiar chlorine scent often associated with swimming pools—it’s not the smell of chlorine itself.  It’s the smell of chlorine working. As chloramines build up they reduce the effectiveness of chlorine—like a traffic jam.  This is when it’s time to Shock your swimming pool. 

    UV rays from the sun breakdown chlorine molecules which also contributes to making chlorine less effective. Pool Stabilizer contains cyanuric acid or s-triazintrione, which combines with chlorine, making the chlorine less likely to react to sunlight.  It’s like sunblock for chlorine! (Dosage: 1lb per 3,000 gals for 40ppm stabilizer, 1 lb per 4000 gals for 30 ppm stabilizer) Adding Pool Conditioner will save you money spent on chlorine in the long run. 

    Can I use Bromine In My Pool?

    Due to Bromine Tablets slow-dissolving nature, bromine can take longer to build up a residual in the water and is therefore more difficult to raise quickly if the bromine level drops.

    You can use a floater for a spa, but pools are too large and bromine dissolves much more more slowly than chlorine, which is why it’s only sold in 1" tabs. It can become difficult and potentially expensive to adjust your Bromine levels in a large swimming pool.

    To use bromine tabs in a spa however, you must already have a bromide ion 'bank' built up, or a preexisting level of bromide (the reduced form of bromine), or you can add Brom Booster to raise levels with just a few tablespoons. Then you can use the bromine tabs in a feeder.  Bromine is far more stable and effective in high temperatures, which is why it is almost always used in spas and hot tubs.

    Can I Use Chlorine In My Spa?

    The money you will save by purchasing chlorine over bromine for use in a spa is negated rather quickly due to the fact that you will need to use much more chlorine to keep the spa sanitized due to the heat of the water, heavy bather loads, and since it cannot be reactivated the way that Bromine can. Bromine tablets can be used in small floating feeders in spas or hot tubs because they hold such a small amount of water and the bromine can disperse more effectively.

    Bromine is also more effective over a broader spectrum on the pH scale than chlorine. In the context of a spa, 4 people entering the water can cause extreme swings in the spa pH level since it is a significantly smaller volume of water. When pH levels rise above 8.0, chlorine can become 50% less effective.

    Never Mix Chlorine and Bromine

    Some people may choose to sanitize via Bromine because they have sensitive skin.  Some people prefer the convenience of chlorine’s ability to quickly be raised or lowered.  However, if you do decide to switch from one to the other you will need to buy a new feeder or floater.  Mixing Chlorine and Bromine can cause a dangerous chemical reaction with even the slightest bit of residue. 

    For More Info Check Out Our Chlorine and Bromine eGuide:

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