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HTH Pool Care Shock Advanced — Granules, 6 Pack (6 lb total) — Pool Shock Treatment for Weekly Pool Sanitizing

4.6 stars out of 7510 reviews

(4.6)|

7,510 ratings

HTH Pool Care Shock Advanced — Granules, 6 Pack (6 lb total) — Pool Shock Treatment for Weekly Pool Sanitizing HTH Pool Care Shock Advanced for Swimming Pools Granules 6 Pack 1 lb HTH Pool Care Shock Advanced for Swimming Pools Granules 12 Pack 1 lb HTH Pool Care Shock Advanced for Swimming Pools Granules 1 lb

Count Per Pack:6

Key item features

Multi-functional shock treatment for weekly use
Prevents bacteria & algae
Use weekly to solve 90% of pool water problems within 24 hours
Restores crystal clarity in 24 hours
Visibly brilliant sparkle
This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent over-stabilization or chlorine lock.

Specs

Chemical standard type
Calcium Hypochlorite Shock
Form
Granules
Pool chemical type
Swimming Pool Shock
Weight
6 lb

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About this item

Product details

HTH Pool Care Shock Advanced, Prevents Bacteria & Algae, Cal Hypo Formula, 1 lbs (Pack of 6)

HTH® Pool Care Shock Advanced is the powerful 4-in-1 formula with Cal Hypo that kills and prevents bacteria and algae as well as reduces chlorine odor and irritation for crystal clear, healthy water. Traditional chlorine products contain cyanuric acid (CYA). When too much CYA builds up, it can cause over-stabilization or chlorine lock and cloud your water. The fast-acting, fast-dissolving Cal Hypo formula in HTH® Pool Care Shock Advanced provides chlorination without adding extra CYA for a beautiful sparkle all season. This product is great for all pool types and won't fade your pool liner.

How To Use HTH® Shock Advanced: Follow the on-pack instructions according to your pool size to add HTH® Shock Advanced directly to swimming pool water or skimmer. Make sure to use a clean, dry scoop. For best results, apply HTH® Shock Advanced as part of your weekly pool care routine to keep free available chlorine levels between 1 and 4 ppm.

Multi-functional shock treatment for weekly use
Prevents bacteria & algae
Use weekly to solve 90% of pool water problems within 24 hours
Restores crystal clarity in 24 hours
Visibly brilliant sparkle
This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent over-stabilization or chlorine lock.

info:

We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.

Specifications

Chemical standard type

Calcium Hypochlorite Shock

Form

Granules

Pool chemical type

Swimming Pool Shock

Weight

6 lb

Warranty

Warranty information

N/A

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Warranty url

https://hthpools.com/pages/privacy-statement

Customer ratings & reviews

4.6 out of 5 stars

stars7,510 ratings1,806 reviews

How item rating is calculated

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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?

Apr 30, 2023

Item details

Count per pack: 12

5 out of 5 stars review

Verified Purchase

Great product at good price!

This shock is always the best priced and always gets my pool water right. You can see how green my pool was (I haven't uncovered it yet- just trying to keep the scum/algae beat down until I have time to open it and tend to it)- I have a large inground pool (approx 30k gal) and only used 4 of the 6 bags in this pack and it turned the scum/algae from deep green (you can still see at edge above the water line) to much better lighter color in the skimmer and made the water clear. Will use again when I'm ready to open for the season (after nearby tree drops it's flowers over the next 2 weeks). I peeked under the cover and the entire pool is better at the same rate the skimmer area is better. Have used this product for years and never had an issue.

Helpful?

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!

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