HTH Pool Care Chlorine Shock Treatment, Pool Chemical Shock, Granules, 5 lb, for Weekly Pool Chlorination
HTH Pool Care Chlorine Shock Treatment, Pool Chemical Shock, Granules, 5 lb, for Weekly Pool Chlorination
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HTH Pool Care Chlorine Shock Treatment, Pool Chemical Shock, Granules, 5 lb, for Weekly Pool Chlorination

4.7 stars out of 252 reviews
(4.7)|
252 ratings

Key item features

  • Multi-Action Treatment: Shock treats, sanitizes, clarifies, and helps prevent bacteria and algae in swimming pool water with a convenient, easy-to-use granular formula.
  • Fast-Acting Solution: Utilizes a Cal Hypo-based formula that is fast-acting and fast-dissolving, designed to solve 90% of pool water problems within 24 hours when used weekly.
  • Prevents Overstabilization: Sanitizes without adding cyanuric acid (CYA), preventing overstabilization or chlorine lock for a visibly brilliant sparkle.
  • Broad Pool Compatibility: Suitable for all pool types, including vinyl-lined pools and salt water systems, without fading the pool liner.
  • Weekly Chlorination: Designed for weekly pool chlorination to boost chlorine levels and maintain free available chlorine between 1 and 4 ppm.
  • Integrated Pool Care: Recommended for use with HTH 6-Way Test Strips to test and balance swimming pool water twice weekly for optimal results.
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Current price is $28.04$5.61/lb
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Whitehall Supercenter
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4.7 out of 5 stars
stars252 ratings168 reviews
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Reviews summary

Pros
  • : Dissolves easily in water with little effort.
  • : Directions are easy to read and follow.
  • : Maintains pool water transparency.
  • : Offers good value at this cost.
  • : Made with durable and sturdy components.
Neutral
  • : Effective at times, but prone to fluctuations.
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Showing 1-3 of 168 reviews

Nov 18, 2025
Amanda
Walmart Associate
5 out of 5 stars review

Verified Purchase

Excellent Pool Shock -Easy, Effective, and Awesome

I've tried several pool shock products over the years, and this one is by far the easiest and most reliable. I don't have to deal with measuring out messy powders. Within a few hours, the water looks noticeably clearer and fresher. What really sets this shock apart is that it doesn't cause chlorine lock. I've had issues in the past with stabilized shocks building up too much conditioner in the water, but this one keeps my chlorine levels responsive and easy to balance. If you want a shock that works fast, keeps the water sparkling, and doesn't leave you fighting chemical issues afterward, this is a great choice. I'll definitely be buying it again!

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Oct 26, 2024
Bethany
Top Reviewer
5 out of 5 stars review

Verified Purchase

Does exactly as says.

This shock works, amazingly, as do all HTH products, in my opinion. It does exactly what it is supposed to do, and it does diss dissolve extremely fast, faster than powder. Also prevents chlorine lock. So yeah, does exactly what it says it does… Are you serious OK? what else do you really want from a product? So yes, five stars.

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Oct 16, 2024
Tigertame4
5 out of 5 stars review

Verified Purchase

A multi use product

I used this for years for our pool. It works great and kept our pool clean and sparkly. This bottle I bought to keep on hand for disasters. It is a stable form of chlorine to use for disinfectant or to purify drinking water.

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