Top 10 Best pool shock for inground pool in 2026

Last Updated - 6/7/2026

🏆Best Choice

HTH

HTH 52036R Pool Care Shock Advanced, Swimming Pool Chemical - Cal Hypo Formula, Prevents Bacteria & Algae, Restores Crystal Clear Water - Shock Treatment, (6 Pack)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•BENEFITS: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity
•FEATURES: Multi-functional shock treatment for weekly use to solve 90% of pool water problems within 24 hours and restore crystal clarity
•VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
•COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
•YOU'RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

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$26.76

$35.99

-26%

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Clorox Pool & Spa

Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Pool Algae Treatment: Our Pool Algaecide and Clarifier is specially formulated to treat existing algae while providing long-lasting defense against stubborn growth, ensuring that your pool remains clear and algae-free for an extended period of time.
•Maintain Crystal Clear Water: Kills and prevents all types of swimming pool algae (green, mustard, black algae) for crystal clear swimming pool water.
•Non-Foaming Formula: Spend less time maintaining and more time enjoying your pool with this Swimming Pool Algaecide and Clarifier, which features a non-foaming formula.
•Suitable for Use in All Types of Pools: This product is proven to meet the needs of every pool owner, as it is compatible with all types of pools, including saltwater pools. You can trust our product to deliver exceptional performance and keep your pool water clean and clear.
•For best results, add to the deepest end of the pool with the filter running. Circulating pool water when applying chemicals helps disperse chemicals throughout the pool for maximum coverage
•Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations.

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$14.88

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Clorox Pool & Spa

Clorox® Pool&Spa™ Shock XTRABLUE® Plus, Kills Bacteria & Algae in Swimming Pools, Swim-Ready in 15 Minutes, (12-Pack)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•6 in 1 Formula: Kills bacteria and algae to maintain a clear swimming pool. Our algae-fighting formula prevents algae for crystal-clear water. Destroys contaminants to aid filter performance and clear dull, cloudy water
•Swim-ready in 15 minutes: Fast dissolving formula works quickly so you can treat and swim in just 15 minutes.
•Compatibility: This product is safe for all swimming pool surfaces, including vinyl, plaster, fiberglass, and tile.
•Usage: Use 1 lb. per 12,000 gallon of water. Shock pool weekly and after heavy use, high temperatures, or rain.
•Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common pool problems and get personalized product and dosage recommendations.
•Packaging may vary

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$65.00

$74.99

-13%

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In The Swim

In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 24 X 1 Pound

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Fast-Acting Algae Control: Calcium Hypochlorite (Cal-Hypo) is an effective non-stabilized chlorine shock treatment, ideal for routine maintenance in your swimming pool
•Versatile Use: Suitable for above ground or in-ground swimming pools, spas, and hot tubs; Pre-dissolve or dilute to avoid bleaching the liner
•High Chlorine Content: 65% available chlorine, provides powerful sanitization for crystal-clear water
•Easy Application: Pre-dissolve or dilute to avoid bleaching swimming pool liners; Spread granules in the deepest part of the pool; Brush if needed
•Dosage: Use 1 Pound per 10,000 gallons weekly to maintain 5-10 ppm chlorine levels

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$104.99

$137.92

-24%

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Clorox Pool & Spa

Clorox® Pool&Spa™ Swimming Pool Super Water Clarifier, Creates Crystal Clear Pool Water, 1 Quart (Pack of 1)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Super Water Clarifier: Clorox Pool&Spa Swimming Pool Super Water Clarifier is a concentrated solution that clears dull, hazy, or cloudy pool water, leaving it sparkling clear. Ideal for restoring the clarity and sparkle of your pool.
•Creates Crystal Clear Pool Water: Our Swimming Pool Super Water Clarifier effectively transforms cloudy or dull pool water into sparkling clarity, ensuring a refreshing and inviting swimming experience.
•Easier Filtration: This product combines Small Particles for easier filtration, ensuring that even the tiniest particles are captured, leaving your pool water cleaner and clearer than ever before.
•For Weekly Treatment: Apply this product weekly as part of your routine maintenance to effectively uphold the clarity of your pool water and ensure a consistently clean swimming environment. This is great for before or after a pool party.
•Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations

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$10.55

$12.99

-19%

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CPDI

CPDI Champion 4-Pack Pool Shock, 12.5 Liquid Chlorinator for Swimming Pools, 1 Gallon Each - Fast-Acting Sodium Hypochlorite Sanitizer, Ready to Use, Non-Staining, Non-Scaling, Commercial Grade

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Shockingly Quick Sanitation: Enjoy crystal-clear, swim-ready water faster with Champion Pool Shock’s powerful and potent 12.5 percent sodium hypochlorite formula, providing rapid sanitation for your pool.
•No Cloudiness or Stains: Keep your pool pristine with a formula that doesn’t cloud water or leave residue, preventing stains and ensuring a beautiful, clear swimming environment.
•Ready to Use: With no mixing required, it offers an effortless pool care solution. Simply pour it directly into your pool or feed it through a peristaltic metering pump for easy and effective sanitization.
•Cost-Effective Solution: Save on pool maintenance with a liquid chlorine that offers superior cleaning power at a lower cost, reducing the need for expensive alternatives.
•Reliable and Safe: Certified to NSF/ANSI 60 standards, this commercial-grade liquid chlorine ensures dependable and safe use in various aquatic settings. Available in convenient 1-gallon jugs, packed in a set of 4.

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$52.98

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Doheny's

Doheny's Super Pool Shock 12 x 1 Lb Bags

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Fast-Acting Pool Shock: Instantly boosts chlorine levels to eliminate algae and contaminants, keeping your pool crystal clear.
•Pro-Grade Cal Hypo Shock: Made with 68% calcium hypochlorite and 65% available chlorine for powerful, long-lasting pool maintenance.
•Convenient & Easy to Use: Pre-measured 1lb bags ensure quick, hassle-free application—no measuring needed.
•Effective Dosage: Use 1lb per 10,000 gallons; for spring openings or heavy algae blooms, apply 2-3 doses for best results.
•Trusted Quality, Family-Owned: With over 50 years of pool supply expertise, Doheny’s provides high-quality products you can count on.

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$58.99

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Clorox Pool & Spa

Clorox® Pool&Spa™ Shock Plus, for Crystal Clear Swimming Pool Water, Swim-ready in 15 minutes, Suitable for vinyl pools (6-Pack)

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•4 in 1 Formula: Kills bacteria and won’t impact pH. Clears cloudy water. Destroys contaminants. Improves filter performance
•Swim-ready in 15 minutes: Fast dissolving formula works quickly so you can treat and swim in just 15 minutes
•Compatibility: This product is safe for all swimming pool surfaces, including vinyl, plaster, fiberglass, and tile.
•Usage: Use 1 lb. per 12,000 gallon of water. Shock pool weekly and after heavy use, high temperatures, or rain.
•Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations

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$29.98

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HTH

HTH 52043 Pool Care Shock Advanced, Swimming Pool Chemical Prevents Bacteria & Algae, Cal Hypo Formula, 2 lbs (2-Pack)

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•BENEFIT: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity
•FEATURES: Multi-functional shock treatment for weekly use; Use weekly to solve 90% of pool water problems within 24 hours
•VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
•COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
•YOU'RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

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$19.88

$24.99

-20%

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HTH

HTH 52031 Swimming Pool Care Shock, Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo Formula, 13.3oz (Pack of 2)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•The information below is per-pack only
•BENEFIT: Shock treat, sanitize, clarify, and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use product
•FEATURES: Multi-use pool shock with Cal Hypo; Use weekly to solve 90% of pool water problems within 24 hours; Fast-acting and fast-dissolving
•VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
•COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
•YOU’RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

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$17.14

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