America's #1 Direct Source for Pool Supplies!

1.800.288.7946 Experts Available 24/7

Call Cart
one day delivery

1 Day Delivery

Your ZIP Code: Ashburn Change Location

To Ashburn Change
Celebrating 35+ Years!
Source / Promo Code:WYAARUNKEdit
cart overlay

    Showing 0 of 0 item View All

    Estimated SUBTOTAL* :  $0.00

    *Excludes taxes, handling fee, and EZ Pay Service Fee, if applicable.
    Source Code:WYAARUNK Edit

    Chlorine & Bromine

    1. 1 year ago
      great features
      Much cheaper per lb than buying small 5 # containers at the local store. There are small plastic bags holding the tablets. Much easier to work with than trying to dump out of other containers I used to purchase.
    2. 9 years ago
      Fantastic purchase
      I ordered the 1" tablets from In The Swim, and am now using less tablets, my pool water is alway good when checked and I saved $$$$$
    3. 2 weeks ago
      Great Deal
      Have been a customer for a lkng time & this chlorine works great. It fits our chlorine basket perfect at a reasonable price & free delivery. Also love the coupon codes that make it an even better deal.
    1. 12 months ago
      Worth the money
      First time ever owning a pool. A friend of mine referred me to in the swim. I chanced it by making the purchase but am so thankful. My water is crystal clear and this makes everything easy. These tabs make me thankful for owning the pool. I refer everyone to these tabs.
    2. 3 months ago
      Excellent Tabs
      I love these tabs because they do everything and keep my 50,000 gallon pool sparkling clean.
    3. 2 years ago
      Replenished our supply
      In the Swim ships quick. Very competitive prices. This tablets work great at maintaining our chlorine level. We put a tablet in each of the skimmers and the water remains crystal clear. The tablets last about 3 to 4 days (less on real hot summer days). We repurchase these tablets at least every year.
    1. 1 month ago
      Liquid Chlorine No More
      I have been using Liquid Chlorine from In The Swim for several years. The 5 gallon liquid chlorine started feeling heavier and heavier. This is a great (and lighter) replacement. Works just as well.
    2. 4 years ago
      Cheaper then Liquid
      My second year with this product. Works great, quick delivery.
    3. 3 months ago
      Much easier than the liquid and does just as good of a job.
    1. 1 month ago
      Individually packaged bags of tablets
      I got the 50 lb. bucket and all the bromine tabs were portioned into easy to pour bags. Much easier that trying to scoop the tabs!
    2. 2 weeks ago
      Bromine bslances big pool
      Take it easy, bromine and shock from In The Swim keep my 36 000 gallon pool clear. Good price on shock
    3. 1 month ago
      Outstanding Bromine from In The Swim
      I bought this about a month ago with a mailer discount coupon and it was cheaper than Amazon :). In The Swim has great products, and buying bulk, 50 lbs, saves money. The deliver was fast, in a box. The tablets were packaged in plastic bag packets that will most likely match your in-ground pool requirements, it is not just a big bucket of tablets you need to grab. Timing perfect, It's now very hot in S-Cal. Thanks.
    1. 4 weeks ago
      great product
      Have been using this product for two seasons and really like how easy it is to keep the pool water clear. In fact, I only used one package of shock at the start of the season and then started the calcium hypochlorite regimen. The water was clear in not time at all.
    2. 3 weeks ago
      Great value, even better when on sale!
      I have a 60,000 gal in-ground in the middle of the woods in the northeast... constant debris, wildlife, etc. making its way into the pool on a daily basis makes keeping the chemistry balanced and inhibiting algae growth a constant struggle. Previously I was running to the local pool store and picking up liquid chlorine 15 gals at a shot to balance and shock the pool in conjunction with my In The Swim Tri-Chlor tablets in my 2 chlorinators. I decided to give the Calcium Hypochlorite ... read more Sanitizing Granules a shot when I saw the 50# container on a great sale price while reordering my Tri-Chlor tabs. My first shock treatment only took 6# of granules, where as I typically would need 10-15 gallons to reach the same effect. Cost to product ratio was far better with the Granules, plus I can store the 50# much safer in a smaller space than the equivalent in liquids with fewer trips. Not to mention I'm far less likely to get a chemical burn from splashback or accidental spillage with the granules. From my initial experience, I estimate that I will continue this method over liquid chlorine from now on.
    3. 4 weeks ago
      Works well
      Great price for this product. Took a little longer to get than I thought it would but that may have been the carrier's falt.
    1. 3 years ago
      Works Well So Far
      I bought 50 lbs of the chlorine pill shaped tablets, and they lasted for over a season now, we only needed to purchase a 25 lb bucket to get us through thus season. Pool has remained clean and clear using these tablets, very effective!
    2. 2 years ago
      My pool is too small to use the skimmer sticks
      Last year I purchased skimmer sticks from my pool man and thought they were working wonderfully. This year pool man never returned my calls so I purchased from you. I found out that my stabilizer was off the charts due to the pool being too small for the skimmer sticks. I think they are great for a large pool. I have used products from In the Swim in the past when I had much larger pools. Too bad. Now I need to see if I can sell my 10 lb bucket minus 1 stick.....
    3. 9 years ago
      best results I've ever had
      I have found that I am not useing as much shock and back-up that I had in the past. I have told a number of my friends about this web site and how good the price's are compared to others that I have checked out plus the place that I have used for a number of years. I am now getting ready to make another order on other items that I need because the price's are right and as tight as my money is now, every penny counts. If the other items work as well as the Chlorine sticks do, I'll keep coming ... read more back for other items.
    1. 1 week ago
      Excellent product
      Product doesn't dissolve as fast as a sub par product. Keeps the chlorine stable in my pool with less effort and saves time and money. Terrific tabs
    2. 6 days ago
      50 lbs of 3” tabs
      Everything I’ve come to expect from this company has been fantastic!!! The product I am looking for, at a great price, and shipped blazingly fast! The tabs come in a strong sealed bucket and are all individually wrapped. Same stuff as from the local pool store, just at a smaller price.
    3. 3 weeks ago
      Best price
      Check out local box and pool stores for price on 3" tabs. In the swim beat them by over 50%. They wanted AL ost as much for half the amount of tabs. Always am buying here for all my pool needs
    1. 1 week ago
      Works like a charm
      So much more stable for our pool than regular chlorine tablets. A step in the right direction!
    2. 3 years ago
      Indoor pool so cal hypo is the way to go for us. One tab will typically go about three days. It does require a constant eye on your pH as it will raise pH levels in the pool. Recommend for indoor pools where you don't get direct sunlight and thus don't need cyneric acid.
    3. 1 year ago
      Great product
      Easy to purchase and product was shipped immediately. Tablets are much easier on pool and equipment.
    • 2018-08-14
    • bvseo_sps, prod_bvsp
    • cp_1
    • tr_24
    • loc_en_US, PRD
    • clientname_Intheswim, pc_8, tc_8
    • bvseo_sdk, java_sdk, bvseo-3.1.0
    • CLOUD, getContent, 9ms

    In The Swim Knowledge Pool: Chlorine & Bromine

    In The Swim's Dr. Pool

    Differences between Chlorine and Bromine?

    The general rule is that Bromine is more often used in Spas and Hot Tubs, and Chlorine is more often used in pools. Although they are close cousins and adjacent to each other on the Periodic Table, they have distinct differences, and unique properties to offer benefits to certain users. Bromine vs. Chlorine? Read on for more information about pool and spa sanitizers. 

    Chlorine and Bromine

    • - Bromine can be reactivated to reduce cost, but bromine tabs cost more than chlorine.
    • - Bromine is more stable in hot water, longer lasting sanitation, even during full use.
    • - Bromine is more stable in wider pH range, remains strong under high pH swings.
    • - Bromine Less odor to the water, and less irritation to skin and hair.


    • - Chlorine tablets are the most economical way to sanitize a pool.
    • - Chlorine tablets are stabilized for sun protection, slow dissolve formula.
    • - Chlorine tablets dissolve rapidly enough to treat larger pools effectively.
    • - Chlorine dissolves faster for quick superchlorination or shock treatment.

    There are Several Chlorine Options:

    Chlorine dissolves fast and almost instantly begins to sanitize your pool water.  Chlorine tablets or chlorine sticks can be used in floating chlorinators, or placed to dissolve in an In-line or Off-line chlorine feeder. You can also make use of granular chlorine, dissolved into a large bucket of water for vinyl pools, or sprinkled directly into most concrete pools. Liquid chlorine is another option that offers affordable versatility for sanitizing your swimming pool.

    Chloramines form when a chlorine molecule has combined with ammonia or nitrogen and produces the familiar chlorine scent often associated with swimming pools—it’s not the smell of free chlorine, but of combined chlorine. As chloramines build up they reduce the effectiveness of chlorine—like a traffic jam. When Total Chlorine (Free+Combined) is greater than 0.3 ppm, (TC-CC=FC), this is time to shock your swimming pool. 

    UV rays from the sun breakdown chlorine molecules which also contributes to making chlorine less effective. Although our chlorine tablets are stabilized, it takes some time for a residual to build up. Pool stabilizer (aka conditioner) contains cyanuric acid, which combines with chlorine, protecting the chlorine from sunlight degradation. It’s like sunscreen for your chlorine, and will save you money spent on chlorine in the long run. 

    Can I use Bromine In My Pool?

    Bromine Tablets are slow-dissolving by nature, and can take longer to build up a residual, although bromides can be added to quickly boost levels. Bromine is also un-stabilized, so it does not stand up well to bright sunlight. However, bromine is a popular sanitizer for indoor pools or heavily shaded outdoor pools. Indoor pool owners enjoy the softer odor of bromine, and enjoy the ability to re-activate bromides into bromine, simply by shocking the pool (with chlorine!). 

    To use bromine tabs in a spa, you will need to have a bromide ion 'bank' built up, or a preexisting level of bromide ions (the reduced form of bromine). Many spa users add Brom Booster to raise levels quickly after draining the hot tub. Then you can simply use the bromine tabs in a feeder or floater. 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, whereas bromine remains potent at higher pH levels.

    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 See our Chlorine and Bromine eGuide:

    Chlorine and Bromine eGuide

    Read More | Download