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HTH

HTH 52065, Pool Care Shock Advanced, 24 Pack | Cal Hypo Formula; Prevents Bacteria & Algae; Restores Crystal Clear Water; Shock Treatment

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Availability: In Stock.
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Arrives Saturday, Sep 5
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Size: 24 Pack


Style: Advanced Shock


Features

  • POWERFUL 4-IN-1 FORMULA: Kills bacteria, prevents algae, reduces odor, and restores clarity with advanced HTH chemistry.
  • CRYSTAL CLEAR RESULTS: This Cal hypo powered swimming pool shock treatment clears cloudy water in just 24 hours for sparkling confidence.
  • NO CYANURIC ACID: Cal Hypo formula avoids overstabilization or chlorine lock while protecting pool health, so your chlorine stays effective longer.
  • SHOCK WEEKLY WITH CAL HYPO: For best results, shock weekly with HTH Cal Hypo Shock Advanced.
  • FAST-DISSOLVING EASE: Quick-dissolving cal hypo pool shock makes weekly care simple, reliable, and stress-free.

Description

HTH Shock Advanced pool shock helps you take on cloudy, unbalanced water with confidence. This powerful 4-in-1 swimming pool shock treatment kills bacteria, prevents algae, reduces chlorine odor, and restores clarity—fast. With Cal Hypo technology, it delivers a sparkling clean pool without adding cyanuric acid, so you can enjoy a healthy, inviting swim all season long. For best results, shock weekly with HTH Shock Advanced. HTH is here to help giving you the confidence to keep your water clear, safe, and always swim ready. You're all clear with HTH.

Brand: HTH


Item Weight: 26.4 pounds


Item Form: Granular


Product Benefits: Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water


UPC:


Brand Name: HTH


UPC: 073187520654


Number of Packs: 1


Package Size Name: 24 Pack


Number of Items: 24


Unit Count: 384 Ounce


Item Type Name: Pool Shock


Manufacturer: Solenis


Model Number: 52065


Manufacturer Part Number: 52065


Item Form: Granular


Product Benefits: Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water


Item Weight: 26.4 pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Sep 5

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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