HTH Pool Care Shock Advanced — Granules, 12 Pack (1 lb each) — Pool Shock Treatment for Weekly Pool Sanitizing
HTH Pool Care Shock Advanced — Granules, 12 Pack (1 lb each) — Pool Shock Treatment for Weekly Pool Sanitizing
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HTH Pool Care Shock Advanced — Granules, 12 Pack (1 lb each) — Pool Shock Treatment for Weekly Pool Sanitizing

13.2K ratings
HTH Pool Care Shock Advanced — Granules, 12 Pack (1 lb each) — Pool Shock Treatment for Weekly Pool SanitizingHTH Pool Care Shock Advanced for Swimming Pools Granules 12 Pack 1 lbHTH Pool Care Shock Advanced for Swimming Pools Granules 6 Pack 1 lbHTH Pool Care Shock Advanced for Swimming Pools Granules 1 lb
Count Per Pack12

Key item features

  • Advanced Weekly Treatment: This multi-functional shock treatment is designed for weekly use, effectively preventing bacteria and algae while solving 90% of common pool water problems within 24 hours.
  • Rapid Clarity Restoration: The powerful 4-in-1 formula restores crystal clarity to pool water within 24 hours, providing a visibly brilliant sparkle and reducing chlorine odor and irritation.
  • Cal Hypo Formula: Utilizing a Cal Hypo-based formula, this product sanitizes without adding cyanuric acid (CYA), thereby preventing over-stabilization or chlorine lock.
  • CYA-Free Chlorination: Unlike traditional chlorine products, its fast-acting, fast-dissolving Cal Hypo formula provides chlorination without increasing CYA levels, ensuring a beautiful sparkle all season.
  • Universal Pool Compatibility: Suitable for all pool types, this shock treatment will not fade pool liners, making it a versatile solution for maintaining healthy swimming pool water.
  • Simple Application Process: For best results, apply HTH Shock Advanced weekly according to on-pack instructions, directly to pool water or skimmer, to maintain free available chlorine levels between 1 and 4 ppm.
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About this item

Product details

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Warranty

Customer ratings & reviews

4.6 out of 5 stars
stars
13.2K ratings2,423 reviews
How item rating is calculated
  1. 5 stars82% (10.8K)
  2. 4 stars9% (1,164)
  3. 3 stars3% (373)
  4. 2 stars2% (215)
  5. 1 star5% (639)

Reviews summary

Pros

  • : It delivers clear, effective results and dissolves completely.
  • : The product is sold at lower retail and online prices and has frequent bulk discounts.
  • : System outperforms chlorine and cuts chemical use.
  • : The product clears pool water by morning.
  • : The pool remains free of cloudiness after parties and rain.

Neutral

  • : Performance varies from rapid dissolution to slower breakdown.
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Showing 1-3 of 2,423 reviews

Jun 7, 2026
Reviewer name: WesleyChapelFL
Item details
Count per pack: 12
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

HTH Pool Care Shock Advanced

Walmart's pool supplies are consistently less expensive than other sources and HTH Pool Care Shock Advanced is a perfect example. I've used HTH products for years and have never had any issues. The Pool Care Shock is something I use all the time. I live in FL and between heavy summer rain and the heat and sun, it doesn't take much to throw your pool chemicals out of whack. I use HTH shock (and other HTH products) to keep my pool crystal clear and safe!

Helpful?f5103c50-688f-11f1-970f-13faca9cd0ac384454871
Jul 18, 2026
Reviewer name: Robert
Item details
Count per pack: 12
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Best price and quality

I bought this HTH brand after seeing great reviews on multiple pool care sites. Walmart online purchase and pick up was by far the best price. I was very pleased with this shock. Does really well for us. Crystal clear pool. I followed the directions and mixed in a bucket to add it as a dilution solution. I preferred to add over time into the return stream over 5-7 minutes. If done slowly it disappears almost immediately. Works on my 24 round above ground.

Helpful?f5103c50-688f-11f1-970f-13faca9cd0ac384454871
Jun 10, 2026
Reviewer name: karlee
Item details
Count per pack: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Works as expected

I've used this shock treatment several times and it works exactly as expected. It's easy to apply, dissolves well, and helps keep the pool water clear and clean. The individual packets make it convenient to use the right amount without any guesswork. Great product that gets the job done every time.

Helpful?f5103c50-688f-11f1-970f-13faca9cd0ac384454871
Current price is $57.00$4.75/lb
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  • Free 90-day returns
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