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    Pool Shock

    1. 4 months ago
      Great company!
      Just bought my pool shock for the season. Great company. Great products. Fast and easy, just like I like it!
    2. 2 years ago
      Clouds Water
      This product worked better than the HTH shock that I also purchased however they both do not dissolve like they claim to and they also make the water cloudy. Will probably not order again. I prefer the In The Swim Super Shock...never had a cloudy issue with that product.
    3. 3 days ago
      Great Shock for Price and Excellent Pool Water
      Best Shock I've ever used in 25 years. Very efficient results with less use than in the past with lithium shock
    1. 1 day ago
      Quality and value combined.
      Great value in a product that does a good job of ridding algae and maintaining my pool.
    2. 2 years ago
      Good Only When Needed
      I only use a 68% calcium chloride when opening my pool and after adding water when back washing my sand filter to keep the hardness in check. My local pool store sells bags of this for $0.99/lb. Works great as a shock but even after mixing and pouring in front of returns, the water remains cloudy. Muriatic acid brings the PH back in line and removes the cloudy look. The acid adds to the expense and its another chemical I don't like to store with young children. If you test your water regularly ... read more and keep everything balanced there is no need to use a shock. During the summer I only add 6% liquid chlorine that the local pool store sells for $0.99/gallon. Liquid chlorine will not cloud the water and has no other ingredients to upset my pools chemistry.
    3. 3 weeks ago
      Works well
      The weather has been different than normal so I can't tell yet how well it will work over a period of time but so far I am very pleased.
    1. 2 years ago
      Great results!
      This is our first year in our new house, and the pool had been poorly taken care of by the previous owners. The water was cloudy even after an almost complete water change and balancing. Then it turned green. Yuck! The pool shock we bought from our local pool store was not cutting it. Saw this online and figured it was worth trying. So happy we did! This in combination with Super Floc Out cleared the water right up. Now we use Super Pool Shock once a week to prevent new algae growth. I won't use anything else!
    2. 6 years ago
      Great stuff!
      This stuff works GREAT!! I spent the first half of the summer trying get rid of cloudy or green tinted water. I'd go to he local pool store, plunk down my $100 to $150 and nothing changed. I was putting 2 to 4 bags a week of the other shock. I tried the super shock and the water has been perfectly clear. I put one bag a week and that's it. Plus, it's delivered right to your front door!
    3. 4 years ago
      Now that the summer has passed and I have some experience with this product I feel I can give an honest assessment. It works. The fine granules dissolve much better than other formulations at 68% or less available chlorine, and it has killed and oxidized anything I've ever found in my pool. Figuring the cost per unit of available chlorine shows that this product is cheaper even though it's priced higher. And you use less of it. Recommend that for maximum effect, powder shock should be broadcast ... read more into the pool after the sun goes down.
    1. 10 years ago
      excellent pool shock & spa super chlorinator
      I have had a pool for 35 years and have always used dichlor as my shock (except for hth early on). it works great and the price is good (wish it were cheaper but In The Swim's price compares favorably to the competition). the tub lid is easy on / easy off. NOTE: If you buy a tub for the pool and have a spa, set some of this product aside for use as your spa chlorinating agent. (It is a lot cheaper than buying the spa chlorinating agent which is the identical formulation).
    2. 1 year ago
      Excellent product
      I have had great results with this product. Well worth the money.
    3. 1 year ago
      Great Dissolving Qualities
      In The Swim granular chlorine is the only one we will use in our pool. Coupled with occasional Super Pool Shock treatments throughout the season, the pool stays crystal clear. A great combination, and one that we have counted on for over ten years.
    1. 4 years ago
      Great for smaller pools
      I've been using this product for years in a vinyl lined 9,700 gal. pool. Regular chlorine shock runs the chlorine level up too high for swimming for over 24 hours, but with this product we can swim the next day. (I usually shock late in the evening.) Also, it doesn't bleach the liner. But if the pool gets infected with algae, you need chlorine shock.
    2. 9 years ago
      No more rashes!
      We have had our above ground pool in use for the past 11 years. We were always using cholorine granular on a daily basis. Last year my husband developed a skin rash every time he went in the pool so we had our water tested. Our Cyanunic Acid level was 268ppm. The norm is 30-80ppm. We were advised not to use our pool. When the level of cyanuric acid rises, the “killing power” of the free chlorine residual weakens. At above 50 ppm of cyanuric acid, the time it takes to kill bacteria in the water ... read more is much longer compared to swimming pool water without cyanuric acid. When the level of cyanuric acid builds up, the chlorine becomes increasingly less effective in keeping the water clean and problems such as high bacterial and algae growth can occur. We were advised to drain our pool and start over, which we did. We now only use the Chorine free shock daily and our levels are now in the normal range and our pool is clean. No more rashes! I would have never known that cyanunic acid would have built up in our pool so much over the years and cause bacteria. We definitely recommend using the chlorine free shock and will continue to do so.
    3. 9 years ago
      Fast accting
      I used many other pool shock products and was disappointed,some left residue that forced me to vacuum entire pool, then I had to wait for chlorine count to come down -usually 24 hours,when I switched to chlorine free shock I don't have to worry about these issues, this product does what it supposed to do with no "side effects" could enter the clear water in my pool several minutes after application
    1. 5 months ago
      Hreat Stuff!
      We have been getting all of our pool products from In The Swim for several years. Everything does exactly what they are supposed to do. The Shock and this product are awesome. We have a 44k gal inground pool. Its a struggle to keep the levels up due to size and sun. This product gets the water back in shape over night!! Thank you In The Swim.
    2. 2 months ago
      Great product! Bad container design!
      The product itself is fantastic! It's nice not having to deal with opening 1 lb bags, one by one. However, the lid refused to come off, literally. We actually ended up having to take a hatchet to the top to create a hole get the granules out. Luckily we had an extra empty large container that our 3" chlorine tablets came in, so it ended up dumping the product in that container instead. ITS - you might want to look into the design and why this has happened multiple times (I had read that this was ... read more an issue for another person on the reviews as well). I would still highly recommend this product though.
    3. 3 months 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.
    1. 2 months ago
      The perfect chlorine
      I have been using this chlorine for my pool for the past 2 years. It has done a great job. Wouldn’t want to use any other product.
    2. 4 years ago
      Cheaper then Liquid
      My second year with this product. Works great, quick delivery.
    3. 3 months 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.
    1. 5 months ago
      Great price for great products.
      Great value compared to other places, glad I didn’t get price gouged by the chain stores.
    2. 1 year ago
      Great kit!
      This kit is perfect for keeping our pool clear! It makes maintenance a snap!
    3. 1 year ago
      Excellent product
      Very happy with the results and easy of closing pool
    • 2018-10-15
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    In The Swim Knowledge Pool: Pool Shock

    In The Swim's Dr. Pool

    Shock Treatments for Swimming Pools

    Granular pool shock treatments are a convenient way to sanitize and disinfect pool water. Used in small amounts, our pool shock can raise chlorine levels quickly for a pool found to be lacking. In larger amounts, pool shock will easily super-chlorinate or hyper-chlorinate pools for removal of cloudy water, chloramines, disinfectant by-products, and all types of bacteria, virus and microbes found in pool water. 


    The Many Types of Pool Shock

    •  - Di-Zap Multi Shock is stabilized, and can be used daily in pools, spas and fountains without calcium build-up.
    •  - Pool Shock and Super Pool Shock from In The Swim is suitable for all purposes, sold in bags and buckets.
    •  - Non-Chlorine pool shock does everything that pool shock does, with exception to killing heavy algae blooms.

    The Many Uses for Pool Shock

    •  - Restores clarity to cloudy pool water
    •  - Kills pool algae strains of all types
    •  - Sanitizes to destory bacteria of all types
    •  - Removes chloramines and other chlorine byproducts
    •  - Breaks down organic and non-organic matter, and bather waste
    •  - Raises chlorine levels quickly when found to be near zero
    •  - Removes stains on plaster, pebble and fiberglass pools

    Where's the Lithium Shock?

    Lithium pool shock is no longer available, due to a worldwide shortage of the raw element Lithium. Lithium price increases in 2016 finally reached a tipping point, where manufacturers stopped producing Lithium Hypochlorite. The best substitute for Lithium pool shock is non-chlorine pool shock, in terms of having the most similar features. Di-Zap can also be used in place of Lithium Hypo as well, however it does not dissolve as rapidly; pre-dissolving is recommended for vinyl pools.

    Should I Pre-Dissolve Pool Shock?

    When using chlorine pool shock in a Vinyl pool, it is recommended to pre-dissolve the granules in a bucket of water before adding to the pool. Plaster, pebble and fiberglass pools can pour or broadcast directly into the pool, using a pool brush afterwards to help distribute the granules. To Pre-Dissolve pool shock, pour 1 or 2 bags into a clean 5-gal bucket that has been 3/4 filled with pool water. Stir for 60-90 seconds until completely dissolved, and then pour along the edge of the pool. If any remaining granules fall into the pool, use a pool brush to help them disperse and dissolve. 

    How Do I Shock My Pool?

    •  1. Clean the pool of debris before shocking a pool
    •  2. Balance the water chemistry and adjust pH to 7.2-7.4
    •  3. Each pound of pool shock will deliver between 7-9 PPM, per 10,000 gallons of pool water
    •  4. Add enough shock to reach a target threshold of 10, 20 or 30 PPM, depending on water condition
    •  5. Brush the pool, and run pool filter for 6-8 hours following shock treatment
    •  6. Keep solar covers safely stored off the pool until high chlorine level subsides
    •  7. Check chemistry levels within 24 hours and adjust as needed, if chlorine is found to be zero, repeat shock treatment

    Pool Shock Treatment Tips

    •  - Always add shock to water, Never add water to pool shock
    •  - Always use the entire bag, Never store half-used bags of shock
    •  - Always distribute the shock around the pool, Never pour into the skimmer
    •  - Always shock a pool with a pH level on the low side, 7.2-7.4, where chlorine is more potent
    •  - Always brush the pool after shocking, with a stiff pool brush, or a stainless steel bristled algae brush
    •  - Always rinse out your shock bags in the pool, and allow them to dry before disposing in the trash
    •  - Always sweep up any shock spills immediately, and pour into the pool.
    •  - Never mix chlorine granules with any other type of chemical, or anything except water.

    For More Info See our Pool Shock eGuide:

    Pool Shock eGuide

    Read More | Download