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

4.6 stars out of 7506 reviews
(4.6)|
7,506 ratings

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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Current price is $56.00$4.67/lb
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4.6 out of 5 stars
stars7,506 ratings1,806 reviews
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Showing 1-3 of 1,806 reviews

Nov 11, 2025
Jodi
Top Reviewer
Item details
Count per pack: 12
5 out of 5 stars review

Verified Purchase

Pool clarity

We always use HTH shock for our pool and continue to have crystal clear water. We have tried other pool shock which messed with the chemistry and made more work if we had not tried.

Helpful?e782c080-d40b-11f0-ac61-41720b250fb9384454871
Aug 14, 2025
CHRISTY
Item details
Count per pack: 12
5 out of 5 stars review

Verified Purchase

I think I'm a professional pool cleaner

Worked as expected and highly recommended by several people! It's breaking up the black algae slowly but surely and levels are literally perfect after one use even with all the rain! Everything is on the bottom making cleaning and vacuuming very low maintenance!

Helpful?e782c080-d40b-11f0-ac61-41720b250fb9384454871
Aug 15, 2024
PoolLady
Item details
Count per pack: 12
5 out of 5 stars review

Verified Purchase

Helped my Dark Green Pool!!

My pool has roughly 2500 gallons of water. There was a week of heavy raining plus I had neglected the pool a week before out of ignorance. This is my first pool. After the rain my pool went DARK GREEN. I researched and added a bag of Clorox shock and nothing I added one bag of hth shock and nothing I then bought the six pack of shock and at night I mixed in THREE BAGS the next morning it was light green!! To be sure I mixed in the next 3 bags and it was fully cleared up by midday. Please note - every time I added the chemicals I pre dissolved the shock in a small bucket for fear of ruining my pool liner. Hope this helps someone because it definitely helped me.

Helpful?e782c080-d40b-11f0-ac61-41720b250fb9384454871

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