20 Best Zappit 73 Pool Shock in 2024 Reviews and Buying Guide

3,675 Reviews Scanned

# Preview Product Rating
1 AQUA-ORG PLUS - Granular Calcium Hypochlorite 65% Pool Shock for Swimming Pools, Spas and Hot Tubs... AQUA-ORG PLUS - Granular Calcium Hypochlorite 65% Pool Shock for Swimming Pools, Spas and Hot...
2 Super Shockwave Pool Shock – 73% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends... Super Shockwave Pool Shock – 73% Cal-Hypo Granular Sanitizer for Crystal Clear Water –... No ratings yet
3 In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends... In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends... No ratings yet
4 DryTec 1-1901-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack DryTec 1-1901-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack No ratings yet
5 Rx Clear Stabilized Granular Chlorine | One 50-Pound Bucket | Use As Bactericide, Algaecide, and... Rx Clear Stabilized Granular Chlorine | One 50-Pound Bucket | Use As Bactericide, Algaecide, and...
6 Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool... Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool... No ratings yet
7 HTH 52037 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 12 Count(Pack... HTH 52037 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 12...
8 Leslie's Power Powder Plus Flagship Pool Shock and Super-Chlorinator, 1lb - 12 Pack Leslie's Power Powder Plus Flagship Pool Shock and Super-Chlorinator, 1lb - 12 Pack No ratings yet
9 In The Swim Super Pool Shock Swimming Pool Sanitizer - Fast Dissolving, Non-Stabilized - 70%... In The Swim Super Pool Shock Swimming Pool Sanitizer - Fast Dissolving, Non-Stabilized - 70%...
10 Doheny's Super Pool Shock 24 x 1 Lb Bags Doheny's Super Pool Shock 24 x 1 Lb Bags No ratings yet
11 HTH 22009 Ultimate Mineral Brilliance Chlorinating Granules for Swimming Pools, 50 lbs HTH 22009 Ultimate Mineral Brilliance Chlorinating Granules for Swimming Pools, 50 lbs
12 GLB 23224-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack GLB 23224-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack
13 CLOROX® POOL&SPA™ Shock XTRABLUE®2- (Pack of 6) CLOROX® POOL&SPA™ Shock XTRABLUE®2- (Pack of 6) No ratings yet
14 In The Swim Sodium Dichlor Chlorine Shock Granules for Sanitizing Swimming Pools – Fast... In The Swim Sodium Dichlor Chlorine Shock Granules for Sanitizing Swimming Pools – Fast...
15 BioGuard Burnout 73 (1 lb) BioGuard Burnout 73 (1 lb)
16 HTH 52031 Swimming Pool Care Shock, Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo... HTH 52031 Swimming Pool Care Shock, Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo... No ratings yet
17 Pool Brand Blackout Trichlor Granular 90 Swimming Pool Shock Sanitizer - 90% Available Chlorine -... Pool Brand Blackout Trichlor Granular 90 Swimming Pool Shock Sanitizer - 90% Available Chlorine -... No ratings yet
18 Non-Chlorine Spa Shock for Hot tub - Chlorine Free Hot Tub Shock Treatment & Enhanced Shock to... Non-Chlorine Spa Shock for Hot tub - Chlorine Free Hot Tub Shock Treatment & Enhanced Shock to... No ratings yet
19 BioGuard 52728BIO Smart Shock BioGuard 52728BIO Smart Shock No ratings yet
20 In The Swim Di-Zap Multi-Shock 24 x 1 lb. Bags In The Swim Di-Zap Multi-Shock 24 x 1 lb. Bags No ratings yet

SaleBestseller No. 1
AQUA-ORG PLUS - Granular Calcium Hypochlorite 65% Pool Shock for Swimming Pools, Spas and Hot Tubs...
  • PRODUCT SPECS: 55 pound bucket of calcium hypochlorite (pool shock). Works in in-ground, above-ground pools, spas and hot tubs. 65% Cal Hypo Granules....
  • KEY FEATURES: Fast acting calcium hypochlorite & professional-grade formula tackles algae blooms, restores water clarity, raises chlorine levels to...
  • DIRECTIONS: Ensure the pool filter is running. Measure (1lb for 10,000 gallons of water) & pour into water directly. Distribute evenly. Use a pool...
  • BENEFITS: Non-stabilized formula (no CYA’s) to prevent chlorine lock. Effective for all swimming pool types including pools with liners, gunite...
  • BEST PRACTICES: Keep 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...
Bestseller No. 2
Super Shockwave Pool Shock – 73% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends...
  • Fast-dissolving formula: Our Super ShockWave Pool Shock quickly dissolves upon application, delivering rapid results for cleaner, clearer water in no...
  • Powerful shock treatment: Eliminates organic contaminants, bacteria, and algae, restoring water clarity and freshness for a rejuvenating swim or soak.
Bestseller No. 3
In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends...
  • Powerful chlorine shock treatment that is great for regular maintenance.
  • Quickly eliminates algae, bacteria, and other harmful contaminants from your pool water.
  • Main active ingredient is 68% Calcium Hypochlorite (Cal-Hypo) for quick sanitizing.
  • Dosage: 1 Pound per 10,000 gallons
  • Cal-Chlor granules can be used in swimming pools, spas and hot tubs. Must pre-dissolve/dilute to prevent bleaching of the liner.
SaleBestseller No. 4
DryTec 1-1901-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-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
SaleBestseller No. 5
Rx Clear Stabilized Granular Chlorine | One 50-Pound Bucket | Use As Bactericide, Algaecide, and...
  • CLEAR WATER FOR SAFE SWIMMING - Swimming in crystal clear water does not mean your skin has to suffer. The granular chlorine is 99% sodium diclor...
  • LONG LASTING - Dichlor resists UV light, lasting longer than other types of chlorinating supplies due to built in stabilizer for your swimming pool,...
  • DISSOLVES QUICKLY - Add 1 oz of this cleaning chemical to your pool for every 5,000 gallons your pool contains, daily for the best quick water...
  • FEWER CHEMICALS NEEDED - Our dichlor is pH neutral, meaning less chemical adjustments to be made by you! This pool chlorinator acts as a sanitizer,...
  • TRUSTED POOL SUPPLIES - Rx Clear is the best choice for swimming pool accessories and pool chemicals and supplies.
Bestseller No. 6
Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool...
  • MULTI-PURPOSE - This swimming pool shock works as a strong sanitizer, clarifier, and algicide for clear blue water.
  • EXTRA POWER - Due to its high percentage of chlorine, Mega Shock is a very effective treatment for a quick chlorine boost. The Rx Clear Mega shock...
  • MIX BEFORE YOU FIX - Add this granular powder to a bucket of water before you begin dissolving it in your pool. Add a 1 lb bag per 10,000 gallons of...
  • BEAT THE GREEN - Keep in your swimming pool algae free by adding 2 bags (2 lbs) of shock per 14,000 gallons of pool water. These granules work as an...
  • WORKS BEST AT NIGHT - Maximize performance by adding this shock to your pool at night. Wait to swim 8 to 10 hours after you start the application....
SaleBestseller No. 7
HTH 52037 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 12 Count(Pack...
  • BENEFITS: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and...
  • 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. 9
In The Swim Super Pool Shock Swimming Pool Sanitizer - Fast Dissolving, Non-Stabilized - 70%...
  • Whether you are an above ground or in-ground pool owner, In The Swim’s super shock sanitizer treatment is a powerful, fast-acting booster that is...
  • When confronted with stubborn algae, bacteria, and other harmful water contaminants that can cause illnesses, our In The Swim super shock treatment...
  • The main active ingredient is 73% Calcium Hypochlorite (Cal-Hypo), with a purpose of fighting chloramines that are responsible for the gases that...
  • This super shock treatment is an ideal product for your above or in-ground pool in the fight against those yellow and green algae blooms.
  • Proudly manufactured in the USA for over 40 years.
Bestseller No. 10
Doheny's Super Pool Shock 24 x 1 Lb Bags
  • Fast Acting Pool Shock Treatment: Quickly boost the chlorine levels in your pool to remove algae and other contaminants for crystal clear pool water
  • Pro-Grade Cal Hypo Pool Shock for Regular Maintenance: Made of 68% calcium hypochlorite, with 65% available chlorine, regular doses of this chlorine...
  • Easy to Use: Each pound of chlorine shock comes in its own easy-to-use bag for quick, measure-free use
  • How to Use: Use one 1lb bag of Super Shock per 10,000 gallons of water. Spring openings and pools that have extensive algae blooms may require 2-3...
  • Made in the USA: Doheny's Super Shock is manufactured and packaged in the USA
Bestseller No. 11
HTH 22009 Ultimate Mineral Brilliance Chlorinating Granules for Swimming Pools, 50 lbs
  • BENEFITS: Sanitize, clarify, and soften the water in your swimming pool so it is always ready for fun
  • USE: Apply directly to pool water, broadcasting it evenly over a wide area in the deepest part of the pool. Add granules while filter pump is running...
  • COMPATIBILITY: Chlorine and saltwater systems
  • FEATURES: Kills bacteria and algae; crystal clear results in 24 hours; prevents scale formation; turns blue to show it’s working; softens water;...
  • INCLUDES: One 50-lb container of Ultimate Mineral Brilliance Chlorinating Granules for swimming pools
Bestseller No. 12
GLB 23224-24 Calcium Hypochlorite Pool Shock, 1-Pound, 24-Pack
  • 9 to 18 ounces 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
  • 9 to 18 ounces of this product per 10,000 gallons of water to provide 5 to 10 ppm available chlorine
  • 73% Calcium Hypochlorite
SaleBestseller No. 13
CLOROX® POOL&SPA™ Shock XTRABLUE®2- (Pack of 6)
  • Swim-ready in 15 minutes
  • Kills and prevents algae with algae-fighting formula
  • Kills bacteria
  • Improves filter performance
  • Fast-dissolving
Bestseller No. 14
In The Swim Sodium Dichlor Chlorine Shock Granules for Sanitizing Swimming Pools – Fast...
  • In The Swim's granular chlorine is ideal for use in swimming pools, spas, fountains and water features
  • Powerful sanitizing powder that destroys bacteria, breaks down contaminants and kills algae
  • Calcium-Free formula keeps hard-water pools sparkling clean and crystal clear
  • Contains premium-quality 56% available stabilized chlorine
  • 99% Sodium Dichloro-S-Triazinetrione Dihydrate
Bestseller No. 15
BioGuard Burnout 73 (1 lb)
  • BioGuards Stronges Shock
SaleBestseller No. 16
HTH 52031 Swimming Pool Care Shock, Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo...
  • BENEFIT: Shock treat, sanitize, clarify, and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use...
  • 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
Bestseller No. 17
Pool Brand Blackout Trichlor Granular 90 Swimming Pool Shock Sanitizer - 90% Available Chlorine -...
  • Eliminates bacteria, algae, and other organic contaminants, keeping your pool clean and clear all season long.
  • 99% Trichloro-S-Triazinetrione and 90% available stabilized chlorine.
  • Ideal for swimming pools with white plaster surfaces
  • Removes stubborn black alage from your pool water
  • Can be utilized as an alternative to Calcium Hypochlorite (Cal Hypo) pool shock
SaleBestseller No. 18
Non-Chlorine Spa Shock for Hot tub - Chlorine Free Hot Tub Shock Treatment & Enhanced Shock to...
  • Quick Dissolving Hot Tub Shock - Say goodbye to gross stuff in your hot tub. Enhanced non-chlorine shock gives your Chlorine and Bromine a boost,...
  • Non-Chlorine Shock helps reduce chlorine smell - Whether it is hot tub or spa, our product not only saves you from chloramines which can bring that...
  • Enhanced Chlorine Free Shock Complements Bromine & Chlorine - Our Non chlorine shock for hot tub and spa saves you from the shock. It helps reduce the...
  • The Ultimate Oxidizing Shock for Hot Tub - Liquid hot tub shock made with the highest quality standards, our hot tub and spa shock specialize in...
  • All of our Hot Tub Chemicals are Made in the USA - When you choose AquaDoc, you are getting consistent quality. We take pride in making quality...
Bestseller No. 19
BioGuard 52728BIO Smart Shock
  • Contains Blue Algae-Killing Crystals
  • Kills Bacteria
  • Controls Algae
  • Clarifies Water
SaleBestseller No. 20
In The Swim Di-Zap Multi-Shock 24 x 1 lb. Bags
  • Fast dissolving swimming pool cleanser
  • 99% Sodium Dichlor
  • Stabilized - contains UV inhibitor to prevent chlorine burn-off
  • Ideal for all your water features such as pools, spas, and even fountains
  • Clears cloudy water fast
.