15 Best Pool Shocks To Keep Your Pool Clean In 2024

We all love a clean and crystal clear pool to take our dips in. Getting the best pool shock product can keep the pool clean, hygienic, and safe every time you use it. Shocking a pool refers to adding chemicals, such as chlorine, into water pools to free them of harmful microorganisms, including harmful bacteria and algae, and other particles.

Pool shocking involves raising the chlorine level in the water. This helps in getting rid of the unwanted particles in our pools. Read along as we list some of the best-selling and time-tested pool shock chemical products for you to choose from.

In This Article

Types Of Pool Shocks

Here are the various types of shocking agents for pools.

  • Calcium hypochlorite: This is the strongest shock and is easy to dissolve. The UV rays burn it quickly, and therefore, the chemical does not increase the cyanuric acid level but increases the pH level of your pool. Add it to an outdoor pool in the evening and resume swimming when the normal chlorine level is achieved.
  • Sodium dichlor: This pool stabilizer is a slow-dissolving chemical but lasts long. Sodium dichlor contains a stabilizer that can be used as a shock treatment to maintain the chlorine level of the swimming pool.
  • Potassium monopersulfate: It is a non-chlorine oxygen-based shock that primarily oxidizes and cleans the water.

15 Best Pool Shocks

1. Best Saltwater-Compatible:HTH 52026 Super Shock Treatment Swimming Pool Chlorine Cleaner


HTH 52026 Super Shock treatment is a potent four-in-one pool shock that boosts chlorine levels while also killing and preventing germs and algae for a clear, healthy pool. Each one-pound bag of this best-selling Super Shock helps treat 13,500 gallons of water in just 24 hours. This pool shock is suitable for all types of pools and does not cause the pool liner to fade.

Item Weight: 12 pounds | Product Dimensions: 7 x 10.5 x 10 inches.


  • Package includes 12 bags
  • Compatible with saltwater pools
  • Non-foaming
  • Easy to use
  • Fast-acting and fast-dissolving pool shock


  • May have a pungent chlorine smell

protip_icon Quick tip
Check your pool’s chlorine levels before swimming in it after a shock treatment by dipping a pH test strip in the pool and interpreting the reading based on color (1).

Why We Think It's Worth Buying

The 16,138 positive customer reviews on Amazon are a testament to its quality and reliability.

2. Best Algae-Fighting:Clorox Pool & Spa Pool Shock

Clorox Pool & Spa Pool Shock Image: Clorox

Clorox Pool & Spa Shock XtraBlue clears murky water, kills microscopic pollutants, and fights algae. This effective mixture destroys bacteria without whitening the liner or altering the pH level of your pool. It contains algae-fighting crystals that kill and prevent algae growth, and the fast-acting solution dissolves swiftly, allowing you to cure the pool in under 15 minutes.

Item Weight: 12 pounds | Product Dimensions: 5.38 x 11 x 9.25 inches.


  • Suitable for all kinds of pool surfaces
  • No pre-dissolving required
  • Can be used weekly
  • Contains 12 one-pound packs


  • Packaging may not be great

Why We Think It's Worth Buying

More than 4,250 independent reviewers on Amazon have acknowledged the product's durability and functionality.

3. Best For Bacteria:Dry Tec 1-1901-12 Treatment Pool Shock

Dry Tec 1-1901-12 Treatment Pool Shock is a robust and powerful formula containing 68% calcium hypochlorite, which helps kill bacteria without bleaching the liner or changing your pool’s pH. Loved by many reviewers, the calcium hypochlorite shock for pools removes contaminants from the water, allows the filter to work more efficiently, purifies murky water, and inhibits algae growth.

Item Weight: 12 Pounds | Product Dimensions: 12 x 12 x 7 inches


  • Contains test kits
  • Dissolves well
  • No cyanuric acid additives
  • Includes 12 one-pound packs


  • May leave residue

4. Best Two-Step Shock Treatment:HTH 52032 Shock System For Swimming Pools

HTH 52032 shock system for swimming pools fights significant algae growth and restores crystal purity to your pool. This two-step shock treatment shocks the pool with chlorine to destroy bacteria and algae, and then uses a flocculent to drop dead algae particles to the bottom of the pool. One bag cures up to 20,000 gallons of water, and this pool shock does not cause your pool liner to fade. Go ahead and check out this review video for more details about the chlorine shock for pools.

Item Weight: 7.7 pounds | Product Dimensions: 4.56 x 9.5 x 11.19 inches.


  • Dissolves quickly
  • Can be applied directly to the pool
  • Fast-acting formula
  • Includes four 1.5lb bags


  • May not be compatible with all pools

5. Best Quick-Dissolving:Pool RX Blue Booster Pool Shock


Pool RX Blue Booster kills existing algae quickly, prevents it from returning, and provides you with a clear pool within 24 to 72 hours. In addition, this reliable pool shock booster reduces the calcium level required for your pool and remains effective for up to six months.

Item Weight: 8 ounces | Product Dimensions: 2.75 x 2.75 x 2.75 inches.


  • Dissolves quickly
  • Suits all types of pools
  • NSF 50 certified
  • Can be used with chlorine, salt, and UV or ozone systems
  • Does not stain pools


  • Some packs may not be powdery

Why We Think It's Worth Buying

The whopping 1,800 positive reviews on Amazon reflect the superior quality of this product.

6. Best Pleasant Fragrance:Oxy-Spa Non-Chlorine Oxidizing Shock

Oxy-Spa Non-Chlorine Oxidizing Shock Image: Spa Depot

Oxy Spa’s non-chlorine MPS spa and pool oxidizing shock is a quick-acting shock treatment. It removes soap residues, antiperspirants, natural oils, and build-up from the pool. The formula does not leave behind any odors and clears cloudy water. In addition, this premium pool shock oxidizer can be used in both pools and hot tubs.

Item Weight: 8 ounces | Product Dimensions: 2.75 x 2.75 x 2.75 inches.


  • Each pack helps treat 10,000 gallons of water
  • Pleasant fragrance
  • Active oxygen
  • Less waiting time after use


  • Downsized packaging

protip_icon Do remember
Check manufacturer instructions before using the pool shock, as some pool chemicals are sensitive to daylight and can be used only at night.

7. Best For Micro-Contaminants:Doheny’s Chlorine Super Shock

Doheny’s Chlorine Super Shock Image: Doheny's

Doheny’s chlorine super shock for swimming pools is perfect for giving your pool a rapid chlorine boost. The tried-and-tested versatile pool shock treatment kills algae and bacteria and removes micro-contaminants that cause cloudy pool water. Each one-pound pool shock packet helps treat 10,000 gallons of pool water.

Item Weight: 1 Pounds


  • Contains 65% active chlorine
  • Compatible with saltwater pools
  • Well-packed and easy to use
  • Includes 24 one-pound pouches


  • May leave residue behind

8. Best Non-Stabilized:In The Swim Calcium Hypochlorite Chlorine Granular Pool Shock

In The Swim Calcium Hypochlorite Chlorine Granular Pool Shock Image: In The Swim

In The Swim calcium hypochlorite pool shock is a powerful pool shock treatment product that kills algae, bacteria, and other hazardous impurities in the water. It’s also an excellent shock for pool openings in the spring. This non-stabilized and high-quality formula containing a minimum of 65% available chlorine can be used for regular pool maintenance regimes.

Item Weight: 50 pounds | Product Dimensions: 21 x 13 x 13 inches.


  • Sanitizes quickly
  • Easy-to-use unstabilized chlorine
  • One pound per 10,000 gallons
  • Does not bleach pool liner


  • Needs to be pre-dissolved

9. Best Oxidizing:BioGuard Smart Shock

BioGuard Smart Shock Image: Bioguard

BioGuard Smart Shock formula for swimming pools offers shock treatment of the pool even during the day and allows safe swimming within 15 minutes. The trusted shock has intense oxidizing and cleaning power and breaks bacteria and other organisms. Moreover, its quick-dissolving nature allows you to use it on pool tiles, even painted ones, without bleaching.

Item Weight: 12 pounds | Product Dimensions: 10 x 8 x 12 inches.


  • Can be added to the pool directly
  • Can be used day and night
  • Compatible with chlorine and bromine sanitizing systems
  • Includes 12 one-pound pool shock bags


  • Concentration level might not be very high.

10. Best Water Disinfectant:Austin’s Pool Tech pool shock

Austin’s Pool Tech pool shock Image: Austin's Pool Tech Pool Shock

Austin’s Pool Tech pool shock clears up your pool effectively. Whether you have an above-ground pool, in-ground swimming pool, or a spa, the Pool Tech pool shock provides a powerful filter solution. With 12.5% sodium hypochlorite, this liquid pool shock treatment clears up murky water without any residue, making it a favorite choice of many. In addition, it also washes down black algae on the roof shingles, making regular pool maintenance more effective.

Item Weight: 10.34 pounds | Product Dimensions: 12 x 10 x 6 inches.


  • Disinfects water
  • Leaves the pool water crystal clear
  • Versatile use
  • Ideal for hot tub/spa maintenance


  • Might leave a shock spot

protip_icon Point to consider
Some pool shocks may not be suitable for the type of tile and grout your pool has. Therefore, check for compatibility before buying.

11. Best Long-Lasting Effect:Poolife Rapid Shock

Poolife Rapid Shock Image: Poolife

Poolife Rapid Shock consists of calcium-hypochlorite and is formulated to prevent algae and germ growth. This quick-dissolving shock helps keep pool water clean and clear, and the product is best used during the evening hours while the filter pump is running. Each pack comes with 24 one-pound bags to let you maintain your pool regularly.

Item Weight: 0.01 Ounces


  • Effect lasts for long
  • Makes the water crystal clear
  • Suitable for all kinds of surfaces
  • One bag per 10,000 gallons


  • May not dissolve quickly

12. Best Three-In-One:Rx Clear Mega Shock

Mega Shock from Rx Clear contains 73% calcium hypochlorite, which yields 70% accessible chlorine. The trusted three-in-one sanitizer, clarifier, and algae controller provides crystal clear water for a more comfortable swimming experience. In addition, Mega Shock has a pH of 11, making it an excellent shock and sanitizer for pools for when both chlorine and pH levels are low.

Item Weight: 1 Pounds


  • Does not make the water cloudy
  • Long shelf life
  • Prevents overstabilization
  • Each one-pound bag is suitable for 10,000 gallons of pool water


  • Has to be pre-dissolved

13. Best For Oil Buildup:SpaGuard Enhanced Shock

SpaGuard Enhanced Shock Image: Leisurequip

SpaGuard Enhanced Shock is a unique formulation specially formulated to deliver crystal clear water in systems that use bromine or chlorine, including those that use ionization or ozone systems. Further, it helps clean muddy or foggy water and decreases excessively harsh chlorine aromas.

Item Weight: 6 pounds | Product Dimensions: 8 x 4 x 10 inches.


  • Removes oils and grim
  • Comes with a detailed user manual
  • Removes odor
  • Prevents waterline build-up


  • May leave residue at the bottom

14. Best For All Pool Types:LeisureQuip BioGuard Swimming Pool Shock

The LeisureQuip BioGuard Burnout 73 pool shock super chlorinator restores the pool’s luster and clarity. It contains 73% calcium hypochlorite, and each one-pound bag treats 16,500 gallons of water, making it one of the most potent pool shocks. This pool shock kit is available in 12 and 24 pack options, and the logbook which comes along with the pack helps you keep track of the pool’s upkeep.

Item Weight: 6 pounds | Product Dimensions: 8 x 4 x 10 inches.


  • Suitable for all pool types
  • Includes a pool checklist
  • Has chemical dosage charts
  • Troubleshooting guide


  • Might take time to start working

15. Best Fast-Acting:Ultima 40542-06 T.K.O. Pool Shock


Ultima T.K.O. is a multi-purpose, quick-dissolving, fast-acting pool shock that purifies, sanitizes, and shock cures your pool. The specialized formula provides all-season protection against algae blooms, ensuring your pool water is safe and clean. Each one-pound bag of this multi-purpose pool shock treats 15,000 gallons of water, and the shock contains 73% calcium hypochlorite.

Item Weight: 6 pounds | Product Dimensions: 12 x 12 x 6 inches.


  • Long-lasting effect
  • Long shelf life
  • Recommended by professional cleaners
  • Dissolves quickly


  • Might increase the calcium hardness level of the water
*The prices provided in this article are based on the latest available information. However, they may vary due to changes in pricing by the seller and/or promotional offers.

How To Choose The Right Shock For Pools?

Consider these points when choosing the right shock for pools.

  1. Dissolving speed: Although it isn’t the most important element, the length of time it takes for your pool shock to work is worth considering. While a few give good results within 15 minutes, others may take days to take action.
  2. Chlorine level: Understand the chlorine level in your pool before purchasing or using a pool shock.
  3. Effectiveness: Finding a shock that consistently gives consistent results will assist you in developing a decent swimming pool care routine.

John Melby, a pool service expert and founder of Quality Pool Cleaning Service, says, “For tailored advice and peace of mind, consider reaching out to a professional. A seasoned expert can help you select the best pool shock based on your pool’s unique needs and characteristics, allowing you to make the best choice for safe and enjoyable swimming.

Frequently Asked Questions

1. Can I pour shock directly into the pool?

It is recommended that you dissolve the shock in a bucket of water and then add it to the pool.

2. How long should I wait to swim after I have shocked my pool?

After shocking your pool, it is safe to swim once the chlorine levels have dropped to roughly five ppm or after 24 hours. It’s always a good idea to test the chlorine level first.

3. What is the best time of day to shock a pool?

It is best to shock the pool after sunset.

4. Is liquid pool shock better than powder shock?

Liquid pool shock treatments and powder shock have chlorine as the active agent, but they differ in strength. Liquid chlorine shock has higher pH value and is more effective for large or commercial pools where the traffic is high. Pool shock powder is ideal for smaller pools, especially those at home.

5. Is there a difference in pool shock?

Yes, there are three types of pool shock: cal-hypo, di-chlor, and chlorine-free. Cal-hypo is ideal when the water turns green due to algae, and you can rely on di-chlor for weekly maintenance or when the pool water is dirt-free. A non-chlorine shock is ideal for indoor pools, and it works best when combined with bromine or a saltwater chlorine generator.

6. Is pool shock just chlorine?

No, pool shock can also be a chlorine-free formula or have other active agents, such as potassium monopersulfate. However, the potency of the pool shock is much higher and they can effectively remove the debris, algae, and keep the pool clean.

Why Trust MomJunction?

Our experienced writers and reviewers have listed the best pool shocks to help keep your pool clean. We have included various best-selling chlorine-based and non-chlorine pool shock cleaners that are non-foaming, saltwater-compatible, easy to use, and fast dissolving. We have also included a buying guide mentioning the factors you should consider when choosing the right pool shock and answered some commonly asked questions for your convenience.

Pool shocks are necessary for swimming pools as they help eliminate unwanted particles from the water, allowing you and your family to have a joyful time relaxing and having fun. Here, the options for the best pool shocks include various cleaning agents that are effective, easy to use, and dissolve quickly to ensure your pool is primed for swimming. Before choosing, check the chlorine levels in your pool and the dissolving abilities of your preferred treatment. You should also consider the quantity, shelf life, benefits, and other features for efficiency.

Infographic: When To Use Pool Shocks And Different Types

If you have a backyard swimming pool or spa, buying a good pool shock would be the best investment to keep the pool clean. But, there are several types of pool shocks available on the market. Therefore, we’ve provided information on types of pool shocks along with the reason for using them to make sure that you make an informed decision.

Types Of Swimming Pool Shocks And Tips For Using Them (infographic)

Illustration: Momjunction Design Team

Get the high-quality PDF version of this infographic.

Download Infographic in PDF version


MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.
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