HTH Pool Care Chlorine Shock Granules for Algae Prevention, Fast-Acting, 12 pack
HTH Pool Care Chlorine Shock Granules for Algae Prevention, Fast-Acting, 12 pack
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HTH Pool Care Chlorine Shock Granules for Algae Prevention, Fast-Acting, 12 pack

Key item features

  • Weekly Boost: Provides an intense weekly chlorine boost, quickly increasing chlorine levels to address 90% of pool water problems within 24 hours.
  • Algae Prevention: Effectively prevents bacteria and algae growth, contributing to a clean and clear swimming pool.
  • Fast Dissolving: Features a fast-acting and fast-dissolving granular formula for efficient application and rapid results.
  • Cal Hypo: Utilizes a Cal Hypo based formula that delivers chlorination without adding extra cyanuric acid (CYA), preventing over-stabilization or chlorine lock.
  • Universal Compatibility: Suitable for all pool types and will not cause fading of pool liners.
  • Simple Application: Can be added directly to swimming pool water or skimmer, with instructions provided for proper dosage based on pool size.
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Current price is $43.9722.9 ¢/oz
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About this item

Product details

Specifications

Customer ratings & reviews

4.6 out of 5 stars
stars447 ratings185 reviews
How item rating is calculated
5.0
5.0
5.0
4.6
4.4
  1. 5 stars80% (359)
  2. 4 stars9% (41)
  3. 3 stars4% (20)
  4. 2 stars1% (4)
  5. 1 star5% (23)

Reviews summary

Pros

  • : Instructions are easy to understand and apply without measuring.
  • : Directions are simple and straightforward.
  • : Quickly sanitizes and keeps water crystal clear.
  • : Dissolves in a few hours or less.
  • : Offers budget-friendly solutions for pool maintenance.
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Showing 1-3 of 185 reviews

May 9, 2025
John
5 out of 5 stars review

Verified Purchase

HTH Pool Care Shock is good but the HTH Pool Care Shock Advanced is even better and that's what I use. It cleared up an old in ground pool with a persistent algae problem and left no shock residue on the bottom like other shock treatments, Advanced rules !

Incentivized Review
Helpful?3WCUT2OA5SK16946252118
Sep 2, 2025
anonymous
5 out of 5 stars review

Verified Purchase

Easy to use

Premeasured packets make dosing the pool easy. Sometimes a white dust floats on the water surface after pouring in, but it clears up in a day.

Helpful?3WCUT2OA5SK16946252118
Sep 9, 2025
WalmartCustomer
5 out of 5 stars review

Verified Purchase

Its what I was looking for and the price was good. The product met the description in the ad. Packaging was very nice.

Incentivized Review
Helpful?3WCUT2OA5SK16946252118