10 Best pool shock (2025)

10 Best pool shock options for 2025 offer effective solutions for maintaining crystal-clear water and a healthy swimming environment. These top-rated products include powerful chlorine and non-chlorine shocks that quickly eliminate contaminants, bacteria, and algae. Featuring easy-to-use formulas, they cater to various pool types and sizes, ensuring optimal sanitation. Brands like HTH, Clorox, and In The Swim lead the market with their reliable and fast-acting formulations. With the right pool shock, you can enjoy a sparkling clean pool all season long, making your swimming experience safe and enjoyable for family and friends.

SaleBestseller No. 1

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

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

SaleBestseller No. 2

Clorox® Pool&Spa™ Shock XTRABLUE®2, Kills Bacteria & Algae in Swimming Pools, Swim-Ready in 15 Minutes, (6-Pack)

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.

SaleBestseller No. 3

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

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

SaleBestseller No. 4

In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds

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

SaleBestseller No. 5

HTH 52042 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 2 lb

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

Bestseller No. 6

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

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

SaleBestseller No. 7

Pool Shock by Aqua Org Plus - 65% Granular Cal Hypo - Swimming Pool Shock for In-Ground, Above Ground, Spas & Hot Tubs - 12-Pack of 1 Pound Bags

PRODUCT SPECS: 12 Pack of 1lb Bags (12 pounds total) of Aqua Org Plus calcium hypochlorite (pool shock). Bagged individually for easy measurement and use. Works in in-ground, above-ground pools, spas and hot tubs. 65% Cal Hypo Granules. Great for regular maintenance.
KEY FEATURES: Fast acting Aqua Org Plus calcium hypochlorite & professional-grade formula tackles algae blooms, restores water clarity, raises chlorine levels to eliminate unwanted contaminants. Professional formula trusted by pool maintenance experts. Solves 90% of pool water problems.
DIRECTIONS: Ensure the pool filter is running. Measure (1lb for 10,000 gallons of water) & pour Aqua Org Plus into water directly. Distribute evenly. Use a pool brush to ensure granules dissolve into the water and aren’t sitting on the bottom of the pool. Ensure proper circulation and avoid swimming until chlorine returns to 1-4 ppm.
BENEFITS: Non-stabilized Aqua Org Plus formula (no CYA’s) to prevent chlorine lock. Effective for all swimming pool types including pools with liners, gunite pools, and saltwater pool systems. Regular testing of pool water and maintenance are essential for optimal shock treatment results.
BEST PRACTICES: Keep Aqua Org Plus products out of reach of children. Avoid direct contact with skin and eyes. Use in a well ventilated area. Store in a cool dry place, away from sunlight. Follow guidelines and usage instructions provided by the manufacturer. Do not add directly into the pool floater or skimmers.

Bestseller No. 8

Pool Shark 68% Calcium Hypochlorite Pool Shock for Swimming Pools - 12 Pack Chlorine Granules - Swimming Pool Shock 1 lb Bags - Pool Chlorine for Inground and Above Ground Pool Treatment (12 x 1 lbs)

EASY SHOCK TREATMENT FOR FAST RESULTS - After a busy weekend of swimming, your pool needs a quick refresh. Pool Shark fast-dissolving granules make shock pool treatments easy. Just measure it out, toss it in, and watch your water turn from cloudy to crystal-clear in 24 to 48 hours.
CLEANS & CLEARS POOL WATER COMPLETELY - Nothing feels better than stepping into a pool that looks clear and smells fresh. With 68% calcium hypochlorite, our swimming pool chlorine shock granules kill bacteria, fungi, and algae, so you can enjoy safe, clean water with zero cloudiness.
EXACT DOSING NO MATTER YOUR POOL SIZE - Not sure how much chlorine pool shock to use? 1 pound treats 10,000 gallons of water. Safely use these pool chemicals for inground pools that are standard size (10,000-20,000 gal), all the way up to large community pools (100,000-200,000 gal).
COMPATIBLE WITH ALL POOL TYPES - You can use our 68% cal-hypo pool shock for an inground pool and also use our pool shock for above ground pool treatments, spa, hot tubs, vinyl-lined pools, saltwater systems, and all public and residential pools outdoors or inside facilities.
PREMIUM 68% CALCIUM HYPOCHLORITE - Our formula contains 68% active calcium hypochlorite, delivering stronger results than standard chlorine products. When you need fast reliable sanitization, trust Pool Shark to get the job done right the first time.

Bestseller No. 9

DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack

One bag of this product per 10,000 gallons of water
Adjust and maintain pH at 7.2-7.6
Maintain total alkalinity in the range of 60 to 120
One bag of this product per 10,000 gallons of water provides 5 to 10 ppm available chlorine
68% Calcium Hypochlorite

Bestseller No. 10

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

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

Related Posts