Best Pool Shock Reviews in 2021

A swimming pool owner needs to keep their swimming pool clean and tidy. Apart from removing bacteria and algae from your swimming pool, it is essential to keep an eye on “Shocking” your pool as well. It is a process of adding chlorine or non-chlorine chemicals in the swimming pool.

This procedure user can raise the level of chlorine at the point where it contaminates algae and bacteria. Chlorine may become ineffective with time and won’t function well. In this regard shocking your swimming pool now and then is recommended.

It is difficult for most pool owners to decide which is the best pool shock for algae. If you face the same issue, we are here to facilitate you, with the best pool shock reviews, that will keep your swimming pool free from bacteria and algae.

The 15 Best Pool Shock Reviews

Pool ShockRatingPrice
In The Swim Chlorine Pool Shock4.6/5 Check Price
Drytec Calcium Hypochlorite Chlorinating Shock4.6/5 Check Price
Clorox Pool & Spa Shock Xtra Blue 6 Pack4.7/5 Check Price
Hth 67156 Shock Pods Care For Swimming Pools4.5/5 Check Price
Pool Essentials Shock Treatment 6 Pack4.6/5 Check Price
Aqua Chem Xtra Blue Swimming Pool Shock4.6/5 Check Price
Clorox Pool & Spa Xtra Blue 34.6/5 Check Price
Leisure Time Renu2 Renew Non-chlorine Shock 4.7/5 Check Price
Spaguard Enhanced Shock 2 Lb4.7/5 Check Price
Clorox Pool & Spa Shock Xtrablue 12 Pack4.8/5 Check Price
Zapp It 73% Cal Hypo Pool Shock4.7/5 Check Price
Doheny’s Super Pool Shock4.7/5 Check Price
Ultima 24726 Total Control Blended Shock4.3/5 Check Price
Spaguard Enhanced Spa Shock 64.8/5 Check Price
Spachoice 472-3-5081 Chlorine Granules4.7/5 Check Price

1. In The Swim Chlorine Pool Shock

“Overall Best Pool Shock”

Out Favorite choice and best pool shock only In The Swim Chlorine Pool Shock. Due to the fantastic feature of this product, most of the people prefer it. A few features, including the high level of chlorine, makes it worth buying. It will help in killing bacteria and algae.

This product is specially designed to keep your pool safe. It contains 68% calcium hypochlorite that helps to oxidize the swimming pool faster. One pound of the shock is perfect for use in a 10,000 gallons pool.

  • Keep the swimming pool clear.
  • Provide great results.
  • Reasonable price.
  • Doesn’t dissolve well.

2. DryTec Calcium Hypochlorite Chlorinating Shock

“Our Favorite Product”

DryTec Calcium Hypochlorite Chlorinating Shock is specially designed for the swimming pool. It contains calcium hypochlorite that provides 65% more chlorine than other shocks available in the market. This product comes in single bags of 1-pound, which are easy to use. This shock has the ability to kill bacteria and maintain HP level of water.

  • High-level chlorine.
  • Excellent ability to kill algae and bacteria.
  • Maintain HP balance.
  • It takes time to dissolve, the user may need to wait for hours before the swim.

3. Clorox Pool & Spa Shock Xtra Blue 6 Pack

“Excellent Choice”

Clorox Pool & Spa Shock XtraBlue 6 Pack is made of crystals, killing blue. This product helps that will eliminate not only algae but also bacteria are present in the swimming pool.

Clorox Pool & Spa Shock can improve your swimming pool filter performance and restore the pH level.

  • Remove odors and contaminants.
  • Premixing is not required.
  • Perfect for vinyl liners.
  • Has copper algaecide.

4. HTH 67156 Shock Pods Care for Swimming Pools 15 CT

“Right Products”

HTH 67156 Shock Pods can be an excellent choice of yours if you want to increase the level of chlorine in your swimming pool. This shock helps kill bacteria and algae. Users can apply this shock to skimmer or directly to the pool. This shock is compatible and useful for all swimming pool types, including pools with liners and Gunite pools and saltwater pool systems.

  • Fast-acting.
  • Fast dissolving.
  • Kills bacteria and algae.
  • Restores clarity.
  • Sun protected.

    5. Pool Essentials Shock Treatment 6 Pack

    “Essentials Pool Shock”

    The Pool Essentials Shock Treatment 6 Pack is an ideal choice for all swimming pool owners. Just pour it directly into your swimming pool or feed it through the skimmer.

    This shock treatment is facilitating the user with an active ingredient which is called trichloro-s-triazinetrione. It gives 48.6% more chlorine. It is easy for this shock to dissolves in water so that the user can enjoy the required benefits within minutes.

    • Can feed via the skimmer.
    • Dissolves quickly.
    • Useful for above ground and in-ground pools.
    • Can bleach vinyl pool lining.

    6. Aqua Chem Xtra Blue Swimming Pool Shock

    “Aqua Chem Xtra”

    Aqua Chem Xtra Blue Swimming Pool Shock comes in a 5-pack, which is enough to last for a few applications. The Aqua-Chem shocks are the most affordable shocks available in the market. It is designed to kill bacteria and algae from the swimming pool. The best part of this product is that it is recommended for all types of the swimming pool.

    • Excellent results in a clean pool.
    • It is recommended for all pools.
    • Kill bacteria and algae.
    • Not a famous brand.

    7. Clorox Pool & Spa Xtra Blue 3

    “Xtra Blue 3”

    Clorox Pool&Spa XtraBlue Chlorinating Tablets can go the extra mile. These tablets can be an excellent choice of yours as they are multi-functional tablets that work hard to keep your water clear from both bacteria and unsightly algae. They are easy to dissolve and protect the surfaces from scale and corrosion.

    • Kills bacteria.
    • Kills and prevents all types of pool algae.
    • Prevents corrosion, scale, and stains.
    • Long-lasting sunlight protection.

      8. Leisure time RENU2 Renew Non-Chlorine Shock 

      “Leisure time RENU2”

      This is a non-chlorine shock that helps to clean the water. This product can be an excellent choice of yours if you want to see your pool contaminants and odors free. This product can be used with ozone, mineral, bromine, and chlorine purification systems. The buffered formula used in this product is highly appreciated, which ensures that the pH remains stable.

      The best part of this shock is that the user can use the swimming pool within 15 minutes after adding this pool shock.

      • Can be used with different chlorinators.
      • Can be used within 15 minutes after adding shock.
      • Removes odors and contaminants .
      • No long time effective.

      9. SpaGuard Enhanced Shock 2 Lb

      “SpaGuard Enhanced Shock”

      The SpaGuard Enhanced Shock can dissolve in 15 minutes, which means users can use the swimming pool after a short time. It comes in a two pounds bottle that helps to clean a large pool. The cleaning formula used in this product effectively restores Spa water cleanliness and leaves it sparkling for days. 

      • Multipurpose product.
      • Dissolves within 15 minutes.
      • Keeps the water clean and sparkling,
      • Quite expensive.

      10. Clorox Pool & Spa Shock XtraBlue 12 Pack

      “Clorox Pool”

      Those who are dealing with mustard, green and black algae in their swimming pool, the XtraBlue 12 Pack can be a perfect choice. This product comes with a bottle that is easy to open, and it is easier to pour the content into the swimming pool. This product works well in the pool with cloudy water, chlorine odor, contaminants, and eye irritation.

      • Dissolves quickly.
      • Easy to open.
      • Clear instructions are written on bottle.
      • Might not bring the level of chlorine up.

      11. Zapp It 73% Cal Hypo Pool Shock

      “Zapp It 73% Cal Hypo”

      This is amongst the potent shocks you will find on the market today. It is highly economical and offers 70% chlorine to keep bacteria and algae out of your swimming pool.

      The shock comes in a vast 50 pounds bucket that will last the whole summer to keep your pool balanced. If you want a reliable product, this is the shock for you.

      • Quite economical.
      • Lasts the whole summer.
      • Balances the pool well.
      • It was challenging to open.

      12. Doheny’s Super Pool Shock

      “Doheny’s Super Pool Shock”

      The Doheny’s Super Pool Shocks are one of the bestselling shocks. People from all around the world prefer this shock to clean and clear their contaminated pools. It is a fast-acting pool sanitizing material and can dissolve easily. This Pool shock is an ideal choice for a fast chlorine boost to keep pool water clear.

      • Arrives in 24 1-pound bags.
      • Dissolves quickly.
      • Kills algae, bacteria, and other harmful contaminants.

        13. Ultima 24726 Total Control Blended Shock

        “Ultima 24726 Total Control”

        Ultima Total Control is a combination of Pool Shock and Algaecide treatment used to kill algae and shocks the pool water without upsetting its pH balance. This combined granular allows simple,
        direct application to the pool. Ultima Total Control will kill and prevent black, green, and yellow algae. The use of this product improves water clarity, supplementing the chlorine already in the pool. One bottle treats 20,000 gallons.

        • Shock & Algaecide in One.
        • Prevents Green Algae.
        • Improves water clarity.
        • Prevents Black Algae.

          14. SpaGuard Enhanced Spa Shock 6

          “SpaGuard Enhanced”

          It is a multi-purpose shock with four benefits in one. It is a shock, clarifier, flocculent, and pH buffer. It can restore water sparkle and removes unpleasant odors from your swimming pool. It is very easy-to-use and quick-dissolving shock treatment.

          • Easy to use
          • A non-chlorine oxidizer that does not raise chlorine residual.

            15. SpaChoice 472-3-5081 Chlorine Granules for Spas and Hot Tubs

            “SpaChoice 472-3-5081 Chlorine”

            SpaChoice 472-3-5081 is specially designed to dissolve in the swimming pool quickly and thoroughly. Chlorine granules present in this shock provide a steady source of available chlorine to spa water to control algae growth, kill bacteria, and destroy organic contaminants. It dissolves quickly and Completely.

            • Stabilized Spa Chlorine.
            • 56% Available Chlorine.
            • Controls Algae.
            • Kills Bacteria.

              A Complete Buying Guide Pool Shock

              How to shock the pool with liquid chlorine?

              It is quick and easy to shock a swimming pool by using liquid chlorine. There is no need to mix it with water like granular chlorine.

              Is pool shock the same as chlorine?

              The user needs to understand the difference between chlorine and shock. Both of them have the same chemicals and contain the same elements.

              How much pool shock do I need?

              A few hours may require to kill bacteria, algae, and contaminants if the chlorine level is about 10-30 ppm. If a swimming pool’s condition is right, you need to add ½-bag of shock per 10,000 gallons of water to raise the chlorine level.

              Is pool shock the same as bleach?

              Bleach is not the same as a shock, and they are not the same products. The excitement contains more sodium hypochlorite than bleach. That is the most significant difference between shock and bleach.

              How to shock the pool with bleach?

              If you want to shock your swimming pool with the bleach, you can add it in the early evening or late afternoon. Just pour the bleach on the edges of your pool. Circulate the water for a few hours before you swim.

              Can you use pool shock in a pond?

              You can use pool shock in a pond, but excessive use of the shock may kill turtles, fishes, and other plants. That is why it is essential to use the right amount of pool shock in the pond.


              Hopefully, the review was written above about the swimming pool shocks will help you choose the best product for your swimming pool. You can now select the best pool shock that will kill bacteria and remove algae from your swimming pool.

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