HTH 52065 Pool Care Shock Advanced, Swimming Pool Chemical - Cal Hypo Formula, Prevents Bacteria & Algae, Restores Crystal Clear Water - Shock Treatment, 1lb Packs (24 Packs)
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Availability:
Only 2 left in stock, order soon!
Arrives
Jul 27 – Aug 2
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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: 26.43 Pounds
Item Form: Granular
Product Benefits: Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water
UPC:
Brand Name: HTH
UPC: 073187520654
Package Size Name: 24 Pack
Number of Items: 24
Unit Count: 384.0 Ounce
Model Number: 52065
Manufacturer Part Number: 52065
Manufacturer: Solenis
Item Type Name: Pool Shock
Item Form: Granular
Product Benefits: Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water
Item Weight: 26.43 Pounds
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 27 – Aug 2
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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
Size: 12 Pack
Style: Advanced Shock
Works as expected, best quantity and expected quality you would get anywhere else. No issues, clears the pool up just as you would expect. Good to go at a better prices, delivered right to your front door, unless they just throw it in your yard, but that is an Amazon issue not this product.
Reviewed in the United States on June 15, 2026 by Florida investor
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.
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Reviewed in the United States on January 24, 2026 by Florida Girl
Size: 12 Pack
Style: Advanced Shock
24,000 gal in ground pool with Salt Cell. This works it's magic when sunshine deletes the chlorine. Keeps pool crystal clear! Also use 6 -8 oz Algaecide weekly.
Reviewed in the United States on July 5, 2026 by TJ
Size: 15 Pack
Style: Advanced Shock
I see a lot of advice from what I call "Pool Chefs". They have all these methods and all these different ingredients for what works in THEIR pool. Good for them. But that doesn't help your cloudiness, turning green in 3 days, or the fact that you find yourself constantly chasing water quality numbers and don't know why. I recommend that you take any advice you receive about YOUR pool with a grain of salt. Not everyone lives in the same part of the country, has the same issues you're having, or even has the same known and current maintenance history.... How can they POSSIBLY give you specific, exact advice about your pool? I'll admit, it's hard to find the exact precise advice you need for YOUR pool. Even the professionals at the big name pool store down the street from you who do free water testing (an immense benefit) have an agenda and are paid on commission. I recommend Pool Maintenance Made Easy by John Brace to start (for sale here on Amazon). Do not underestimate making SURE you know your pool size. Many people don't, and I've had buyers of a new to them home be told by the sellers a volume 10,000 short because the sellers simply weren't aware. ANYWAY These pool tabs work great and are a great value. The test strips that come with it work really well too. Highly recommended, even if they don't come with the test strips.
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Reviewed in the United States on June 13, 2026 by Phil
Size: 12 Pack
Style: Advanced Shock
It does well I’ve used it for a couple years now, but I think I’m going to switch to something else because it leaves residue on the bottom of the pool kind of like a sandy appearance byproduct from it
Reviewed in the United States on July 4, 2026 by Chris
Size: 12 Pack
Style: Advanced Shock
I recently purchased the HTH 52037 Swimming Pool Care Shock Advanced and have been thoroughly impressed with its performance. This swimming pool chemical has exceeded my expectations, providing excellent results at a fraction of the cost compared to the local pool store. The HTH 52037 Shock Advanced is a cal hypo formula that effectively restores clarity and cleanliness to my pool water. The 12-count pack offers ample supply for regular maintenance and shocking treatments. Each packet is conveniently pre-measured, making it easy to add the correct dosage without any guesswork. What truly stands out about this pool shock is its affordability. I was pleasantly surprised to find that the HTH 52037 Shock Advanced is significantly cheaper than similar products available at local pool stores. This affordability makes it a fantastic value for pool owners who want to maintain crystal-clear water without breaking the bank. In terms of performance, this pool shock delivers excellent results. It effectively eliminates contaminants, bacteria, and algae, leaving the pool water clean, fresh, and inviting. The cal hypo formula ensures a quick and efficient treatment, helping to maintain proper water balance and prevent any potential issues. The convenience factor of these pre-measured packets cannot be overstated. It saves time and eliminates the need for manual measuring, ensuring accurate dosing for consistent results. I appreciate the simplicity and ease of use that the HTH 52037 Shock Advanced provides. In conclusion, I highly recommend the HTH 52037 Swimming Pool Care Shock Advanced for anyone looking for an affordable and effective pool shock. Its cal hypo formula, combined with the convenience of pre-measured packets, makes it a reliable choice for maintaining a clean and balanced swimming pool. Furthermore, the significant cost savings compared to local pool stores add to its appeal. If you're seeking a high-quality pool shock that offers exceptional value, look no further than the HTH 52037 Shock Advanced. It definitely deserves a well-deserved five-star rating!
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Reviewed in the United States on July 17, 2023 by T
Size: 12 Pack
Style: Advanced Shock
We use this shock in our pool & works great!! This is a 12 pack size for a great price. We have a salt water pool we use it in. Will be buying more in the future.
Reviewed in the United States on June 27, 2026 by Julez
Size: 6 Pack
Style: Advanced Shock
Excellent product keep clean of pool.
Reviewed in the United States on July 1, 2026 by Norbert