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HTH

HTH 52037R, Pool Care Shock Advanced, 12 Pack

  • Based on 14,339 reviews
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Availability: In Stock.
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Arrives Monday, Aug 31
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Size: 12 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 a must-have for anyone who wants to keep their pool water crystal clear. This fast-dissolving formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity. Its multi-functional shock treatment for weekly use can solve 90% of pool water problems within 24 hours. The Cal Hypo based formula sanitizes without adding cyanuric acid (CYA), preventing overstabilization or chlorine lock. Compatible with all swimming pools, including vinyl-lined pools and saltwater systems, this product is perfect for everyone. Use it with the HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly for the best results. With HTH 4-in-1 Shock Treatment, you'll always stay all clear for cannonballs!

Brand: HTH


Item Weight: 16 ounces


Item Form: Powder


Product Benefits: Prevents Bacteria,Sanitizes,Kills Bacteria


UPC:


Brand Name: HTH


UPC: 073187520371


Number of Packs: 12


Number of Items: 1


Unit Count: 192 Ounce


Included Components: HTH 52037 Swimming Pool Care Shock Advanced, Swimming Pool Chemical, Cal Hypo Formula, 12 Count(Pack of 1)


Item Type Name: Swimming Pool Chemical Prevents Bacteria & Algae, Cal Hypo Formula


Manufacturer: Innovative Water Care


Model Number: 52037R


Manufacturer Part Number: 52037R


Manufacturer Warranty Description: Warranty


Item Form: Powder


Product Benefits: Prevents Bacteria,Sanitizes,Kills Bacteria


Item Weight: 16 ounces


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 31

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

    • Crystal Clear Water with a Reliable 4-in-1 Treatment
Size: 6 Pack Style: Advanced Shock
If you are looking for a straightforward way to keep your pool or hot tub inviting, the HTH Shock Ultra is a highly effective choice. This fast-dissolving, 4-in-1 formula is designed to solve 90% of common water problems within 24 hours, making it a staple for regular maintenance. I buy these every couple of months because they work wonders for both in-ground pools and hot tubs. The Cal Hypo-based formula is a standout because it sanitizes without adding cyanuric acid (CYA), which helps you avoid "chlorine lock" and keeps your water chemistry balanced longer. Why this shock treatment is a great choice for your maintenance routine: Restores Clarity Quickly: It effectively kills bacteria and algae while reducing the strong chlorine odor and eye irritation often found in busy pools. Multi-Functional Performance: This treatment not only sanitizes but also provides a visibly brilliant sparkle to the water by removing organic contaminants. Universal Compatibility: It is safe for use in all swimming pool types, including vinyl-lined pools and saltwater systems, providing peace of mind regardless of your setup. Convenient Weekly Use: Designed for easy application, this shock treatment helps you maintain a healthy environment for your family with minimal effort. I haven't had any issues with packages arriving broken or anything leaking out in the box. This 6-pack lasts me about 2 months as I use it for an in-between. ... show more
Reviewed in the United States on January 24, 2026 by Florida Girl
    • Crystal clear water 24 hours later
Size: 12 Pack Style: Advanced Shock
I had a very stubborn algae as a result of not caring for my pool for over 10 months due to a medical issue. I tried 7 different products and even changed my filter and water would get better, but never clear. I tried double doze of this stuff and I could see the bottom of my pool within about 6 hours. After 24 hours I had crystal clear water as if I just filled up my pool. This stuff is amazing and works better than anything you can purchase online. I highly recommend this product specially if you have stubborn algae! ... show more
Reviewed in the United States on July 12, 2026 by AJ
    • Keep my pool sparkling clean
Size: 6 Pack Style: Advanced Shock
Review Image by Robin
HTH Shock Advanced is keeping my pool sparkling clean. I have a 24' x 52" above-ground pool, and I typically use one package of HTH Shock Advanced every 2 to 3 days, depending on how much sun and rain we've had. It works quickly to keep the water crystal clear and helps prevent algae and cloudy water, even during the hottest parts of summer. It's simple to use, reliable, and has made maintaining my pool much easier. I highly recommend it to anyone looking for an effective pool shock treatment. ... show more
Reviewed in the United States on July 14, 2026 by Robin
    • Easy to keep things clear
Size: 6 Pack Style: Advanced Shock
I have a stock tank pool and I only need to put a bit of this in every week and it keeps it clear. Better than the chlorine tablets.
Reviewed in the United States on July 21, 2026 by Alexcis H Lopez
    • Great weekly shock
Size: 12 Pack Style: Advanced Shock
I've been using this shock for years and usually buy from warehouse store, but Amazon had it on sale for about fifty cents left a bag. Stuff works great and doesn't increase your CYA. One star off for poor packing by Amazon, looks like it rolled around in the back of the delivery truck.
Reviewed in the United States on April 1, 2026 by G-Man
    • Clean pool all summer.
Size: 12 Pack Style: Advanced Shock
Keeps my pool clean and water clear. Easy to use and works well with my vacuum cleaner to maintain pool water and balance of chemicals. Each bag treats 12500 gallons of water in the pool.Just brush down the walls.
Reviewed in the United States on July 29, 2026 by EDMONDS
    • Good product
Size: 12 Pack Style: Advanced Shock
Worked great. Easily dissolved
Reviewed in the United States on August 2, 2026 by rebecca
    • Keeps my pool clean
Size: 6 Pack Style: Advanced Shock
I have a 35,000 gallon in ground pool. I use two packs once per week along with chlorine tablets that constantly float around my pool. Between those and a 1.5HP pool pump, my pool stays crystal clear when paired with once weekly vacuuming and brushing
Reviewed in the United States on July 30, 2026 by Tim

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