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HTH

HTH 52035 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 1lb (Pack of 2)

  • Based on 196 reviews
Condition: New
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$9.61 Why this price?
Holiday Deal · 20% off was $11.94

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Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, Nov 26
Order within 16 hours and 28 minutes
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Features

  • The information below is per-pack only
  • 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

Brand: HTH


Item Form: Powder


Product Benefits: Sanitizes,Prevents Bacteria,Kills Bacteria


Number of Items: 2


Unit Count: 32.0 Ounce


Product Dimensions: 4.5 x 1 x 11 inches


Item Weight: 2.11 pounds


Department: Unisex-Adult


Manufacturer: Innovative Water Care


Item model number: 52035


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 26

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
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  • Afterpay Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Worked as it should. Great Price!
Worked as it should. Great Price!
Reviewed in the United States on October 23, 2025 by Blanchette Company

  • Algaecide boost
Yeah. Never enough algaecide
Reviewed in the United States on October 16, 2025 by Willie's Best

  • It works for about a week and a half on a 18ft pool
Used this item to keep my pool going until I open it. The weather got the water temp up in my pool before I wanted to open it so I shocked it for 2 weeks before spending the money for the summer chemicals will same me money at the end of the year. Still have a bag left for the end if I have the same problem and run out of pool chemicals. ... show more
Reviewed in the United States on June 7, 2025 by john

  • Great Pool Product
Great quality and color, great design. Will continue to buy this item, great value, Leave water clarity and quality great.
Reviewed in the United States on July 17, 2025 by Christina

  • Works good and much better price than my local stores.
Price on this has just kept going up at my local stores and half the time they don't have any in stock.
Reviewed in the United States on June 27, 2025 by Mark Crawford

  • Better than most
awesome value!!
Reviewed in the United States on July 24, 2025 by SHARLENE CAMPFIELD

  • Good price
Good price
Reviewed in the United States on April 5, 2025 by Gregg S

  • Affordable price
Good price
Reviewed in the United States on July 20, 2025 by Donath K Justice

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