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HTH

HTH 52035 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 1lb

  • Based on 15,827 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Sep 9
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Size: 1 Pack


Style: Advanced Shock


Features

  • 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

Description

The HTH 4-in-1 Shock Treatment is the ultimate solution for crystal clear pool water. This fast-dissolving formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity. With its multi- functional shock treatment for weekly use, you can easily solve 90% of pool water problems within 24 hours. The Cal Hypo based formula sanitizes without adding cyanuric acid (CYA), which prevents overstabilization or chlorine lock. This product is suitable for all including-lined saltwater systems. For the best results, use the HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly. Stay all clear for cannonballs with HTH 4-in-1 Shock Treatment!

Brand: HTH


Item Weight: 1 Pounds


Item Form: Powder


Product Benefits: Sanitizes,Prevents Bacteria,Kills Bacteria


UPC:


Brand: HTH


Item Weight: 1 Pounds


Item Form: Powder


Product Benefits: Sanitizes,Prevents Bacteria,Kills Bacteria


UPC: 073187520357


Unit Count: 16.0 Ounce


Product Dimensions: 4.5 x 1 x 11 inches


Item Weight: 1 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, Sep 9

This item is non-returnable:

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

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Need these for your pool/hot tub
Size: 6 Pack Style: Advanced Shock
The HTH 52036R Pool Care Shock Advanced has become my go-to solution for keeping our hot tub water clean, clear, and safe all year long. This 6-pack is a fantastic value, and the calcium hypochlorite (cal-hypo) formula really does the job. Fast-Acting Shock Treatment: Within just a few hours of applying, the water goes from cloudy or dull to sparkling clean. It clears up algae and cloudy water impressively fast. Kills Bacteria & Prevents Algae: I’ve had issues with algae growth in the past, especially during hot, humid weeks. This shock keeps that completely under control. It also gives peace of mind that bacteria are being eliminated regularly. Each packet is pre-measured and dissolves quickly without leaving residue. No complicated mixing or measuring—just pour directly into the pool. The HTH Shock Advanced is a powerful and convenient way to maintain a clean and healthy pool. It restores clarity, controls algae and bacteria, and is very user-friendly. A pool care essential—I always keep a box on hand! ... show more
Reviewed in the United States on July 19, 2025 by Scott W.
    • Read the instructions and get within the spec ranges first
Size: 1 Pack Style: Advanced Shock
This stuff works! makes life easy and water clear and clean. I don't smell anything, but my pool is outdoor and not indoor so there's that. I say this is quality stuff for sure. Granted i still needed some clorox for pool and spa and some muriatic acid and some baking soda to level things out. But after things are within range, and this is dissolved, separately, just dump it right into the filter stream and let it go. After 4 hr for my little 800 gal pool, it's clear and purrfect to play in! ... show more
Reviewed in the United States on August 13, 2025 by Robbie
    • Shockingly good
Size: 12 Pack Style: Advanced Shock
This is one of the least expensive pool shocks that works to keep water clear and fresh
Reviewed in the United States on August 20, 2025 by Kristi
    • A good, inexpensive shock treatment that works well and dissolves quickly
Size: 6 Pack Style: Advanced Shock
Works perfectly in conjunction with my algaecide for periodic quick algae cleanup. At less than $5 per bag, the price is right..
Reviewed in the United States on July 29, 2025 by Dave D.
    • good product
Size: 6 Pack Style: Advanced Shock
cheap price
Reviewed in the United States on August 17, 2025 by hilda santana
    • Works great
Size: 12 Pack Style: Advanced Shock
This stuff works great at both treating algae and preventing it. I live in Phoenix AZ so my pool is more like a hot tub right now. The warm water is unfortunately very susceptible to algae growth if you don't stay strictly on top of your chemicals. It clears up the water very good. It hasn't gotten rid of ALL the black algae but it's been stubborn against every product I've used. Pool clears up within 24hours. Not too bad on the chlorine smell. Works for at least the week. Ive been getting better at treating the pool weekly to prevent any algae. Like I said the warm water will let algae grow like crazy if I don't stay on top of it. Not any products fault. ... show more
Reviewed in the United States on July 10, 2025 by KatK
    • Clear pool happy family
Size: 12 Pack Style: Advanced Shock
Our pool started off green. We just couldn’t get the chemicals right and found ourselves driving to the pool supply store constantly until finally it became a hassle going there, so we ignored the pool. I never thought to look on Amazon, so glad I did. I love getting our pool chemicals now from Amazon. This shock worked great. Put it in before bed and jumped into a sparkling pool the next morning . Much better priced than the shock we had been buying at our local pool store and waaasy more convenient to have it delivered. ... show more
Reviewed in the United States on August 17, 2025 by Kindle Customer
    • Best shock treatment I've tried
Size: 6 Pack Style: Advanced Shock
One bag wiped out a large amount of algae in a short time and in a few hours the filter cleared the water and took the residue down the floor intakes.
Reviewed in the United States on August 10, 2025 by Robert Barrett

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