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HTH

HTH Pool Shock, Cal Hypo Formula | Swimming Pool Care | 1lb | Pack of 2 | Advanced

  • Based on 196 reviews
Condition: New
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$9.61 Why this price?
Save $2.33 was $11.94

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Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, May 5
Order within 33 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 Weight: 2 Pounds


Item Form: Powder


Product Benefits: Sanitizes,Prevents Bacteria,Kills Bacteria


Number of Items: 2


Brand: HTH


Item Weight: 2 Pounds


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 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: Tuesday, May 5

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
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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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 The Blanchette Company
    • Good price
Product as described. Good price
Reviewed in the United States on December 6, 2025 by Bryan Saffle
    • Great product
Great product to shock your pools. I use this product often in my aboveground pool to keep the water clear and sanitized
Reviewed in the United States on November 6, 2025 by eligio Diaz
    • Worked really well
Worked really well
Reviewed in the United States on December 31, 2025 by Made easy with Moni
    • Quality an price
I use these every summer in my pool.My pool does not turn green and dissolves quickly.It's easy to use in the package.Sizes decent
Reviewed in the United States on December 14, 2025 by Ashley Sinclair
    • Good price
Good price
Reviewed in the United States on April 5, 2025 by Gregg S
    • I grew up using HTH chemicals for the pool. The best!
Hth is always the best for pool chemicals IMO. I use whatever I can get my hands on, but always buy HTH when I can. My pool was turning green before I closed it, 4 bags into 25k gallons and it cleared up overnight.
Reviewed in the United States on October 30, 2025 by Dan
    • Fastest Shipping! Best Deal!! Well Made!! Highly Recommend! AAA++ 5 Stars!!
Fastest Shipping! Best Deal!! Well Made!! Highly Recommend! AAA++ 5 Stars!!
Reviewed in the United States on November 25, 2025 by Gary B

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