---
product_id: 550631445
title: "HTH Pool Shock, Cal Hypo Formula, 13.3oz, Pack of 2 | Swimming Pool Care | Chlorinator | Boosts Chlorine Levels"
brand: "hth"
price: "₱3321"
currency: PHP
in_stock: true
reviews_count: 9
category: "Hth"
url: https://www.desertcart.ph/products/550631445-hth-pool-shock-cal-hypo-formula-13-3oz-pack-2
store_origin: PH
region: Philippines
---

# Fast-acting formula Compatible with all pool types Cal Hypo, no CYA buildup HTH Pool Shock, Cal Hypo Formula, 13.3oz, Pack of 2 | Swimming Pool Care | Chlorinator | Boosts Chlorine Levels

**Brand:** hth
**Price:** ₱3321
**Availability:** ✅ In Stock

## Summary

> 💧 Shock your pool to brilliance — because clear water is the new status symbol!

## Quick Answers

- **What is this?** HTH Pool Shock, Cal Hypo Formula, 13.3oz, Pack of 2 | Swimming Pool Care | Chlorinator | Boosts Chlorine Levels by hth
- **How much does it cost?** ₱3321 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/550631445-hth-pool-shock-cal-hypo-formula-13-3oz-pack-2)

## Best For

- hth enthusiasts

## Why This Product

- Trusted hth brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Prevents Bacteria & Algae:** Keep your pool hygienic and sparkling, ensuring a healthy swim every time.
- • **Universal Pool Compatibility:** Safe and effective for vinyl-lined, saltwater, and all pool types.
- • **Optimize with HTH Test Strips:** Maintain perfect water balance by testing twice weekly for flawless pool care.
- • **Shock Treat & Sanitize Weekly:** Eliminate 90% of pool water issues within 24 hours for crystal-clear water.
- • **Fast-Dissolving Cal Hypo Formula:** Rapidly boosts chlorine levels without cyanuric acid buildup to avoid chlorine lock.

## Overview

HTH Pool Shock Cal Hypo Formula (13.3oz, Pack of 2) is a fast-acting, multi-use pool chlorinator designed to sanitize, clarify, and prevent bacteria and algae. Its unique Cal Hypo formula boosts chlorine levels without adding cyanuric acid, preventing chlorine lock and overstabilization. Compatible with all pool types including vinyl-lined and saltwater pools, it solves 90% of common pool water problems within 24 hours when used weekly. For best results, pair with HTH 6-Way Test Strips to maintain optimal water balance.

## Description

Shock Visit the Store Shock Visit the Store Sanitize Visit the Store Sanitize Algaecide Visit the Store Algaecide Test & Balance Visit the Store Test & Balance Specialty Visit the Store Specialty

Review: Great Pool Care - The HTH 52031 Pool Care Shock worked very well for quickly clearing up cloudy water and boosting chlorine levels in our pool. After using it, the water looked noticeably cleaner and fresher within a short amount of time. The product dissolves fairly quickly and was easy to apply following the directions on the package. It helped control algae and that strong “pool smell” that usually happens when chlorine levels are off balance. I also liked that it restored water clarity without requiring multiple treatments. This shock treatment is especially useful after heavy pool use, rainstorms, or hot weather when chlorine levels tend to drop faster. The packaging was convenient, and the product feels reliable for regular pool maintenance. Pros: Quickly boosts chlorine levels Helps clear cloudy water Effective against algae and odors Easy to use Good for routine pool maintenance Cons: Strong chlorine smell during application Best results require proper water balance and testing Overall, this is a dependable pool shock treatment that helps keep pool water clean, clear, and swim-ready with minimal hassle.
Review: Chlorine keep you clean - I’m very pleased with the HTH 52030B Swimming Pool Care Shock! This product does exactly what it promises—quickly boosts chlorine levels and gets the pool back to looking clean and clear in no time. I’ve used it regularly, and it works fast to clear up cloudy water and keep everything sanitized. It’s especially helpful after heavy pool use or after a storm when the water needs a quick refresh. Just one treatment makes a noticeable difference. The application is simple and straightforward, which makes pool maintenance a lot less stressful. I also like that it’s reliable—you can count on consistent results every time. Overall, this is a must-have for keeping your pool in great condition. Effective, easy to use, and a great addition to any pool care routine. Highly recommend!

## Features

- The information below is per-pack only
- BENEFIT: Shock treat, sanitize, clarify, and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use product
- FEATURES: Multi-use pool shock with Cal Hypo; Use weekly to solve 90% of pool water problems within 24 hours; Fast-acting and fast-dissolving
- VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
- COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
- YOU’RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CF2V7ZBL |
| Best Sellers Rank | #26 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Swimming Pool Chlorine |
| Brand | HTH |
| Brand Name | HTH |
| Customer Reviews | 4.8 out of 5 stars 3,986 Reviews |
| Item Form | Powder |
| Item Type Name | Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo Formula |
| Item Weight | 26.6 Ounces |
| Manufacturer | Innovative Water Care |
| Manufacturer Part Number | 52031 |
| Model Number | 52031 |
| Number of Items | 2 |
| Product Benefits | pevents bacteria and algae |
| Unit Count | 26.6 Ounce |

## Product Details

- **Brand:** HTH
- **Item Form:** Powder
- **Item Weight:** 26.6 Ounces
- **Number of Items:** 2
- **Product Benefits:** pevents bacteria and algae

## Images

![HTH Pool Shock, Cal Hypo Formula, 13.3oz, Pack of 2 | Swimming Pool Care | Chlorinator | Boosts Chlorine Levels - Image 1](https://m.media-amazon.com/images/I/81F8YlXmmYL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Pool Care
*by C***A on May 26, 2026*

The HTH 52031 Pool Care Shock worked very well for quickly clearing up cloudy water and boosting chlorine levels in our pool. After using it, the water looked noticeably cleaner and fresher within a short amount of time. The product dissolves fairly quickly and was easy to apply following the directions on the package. It helped control algae and that strong “pool smell” that usually happens when chlorine levels are off balance. I also liked that it restored water clarity without requiring multiple treatments. This shock treatment is especially useful after heavy pool use, rainstorms, or hot weather when chlorine levels tend to drop faster. The packaging was convenient, and the product feels reliable for regular pool maintenance. Pros: Quickly boosts chlorine levels Helps clear cloudy water Effective against algae and odors Easy to use Good for routine pool maintenance Cons: Strong chlorine smell during application Best results require proper water balance and testing Overall, this is a dependable pool shock treatment that helps keep pool water clean, clear, and swim-ready with minimal hassle.

### ⭐⭐⭐⭐⭐ Chlorine keep you clean
*by V***N on April 6, 2026*

I’m very pleased with the HTH 52030B Swimming Pool Care Shock! This product does exactly what it promises—quickly boosts chlorine levels and gets the pool back to looking clean and clear in no time. I’ve used it regularly, and it works fast to clear up cloudy water and keep everything sanitized. It’s especially helpful after heavy pool use or after a storm when the water needs a quick refresh. Just one treatment makes a noticeable difference. The application is simple and straightforward, which makes pool maintenance a lot less stressful. I also like that it’s reliable—you can count on consistent results every time. Overall, this is a must-have for keeping your pool in great condition. Effective, easy to use, and a great addition to any pool care routine. Highly recommend!

### ⭐⭐⭐⭐⭐ Turned my neglected green pool blue overnight
*by E***E on May 14, 2026*

I used this last year after coming home from a long international trip to a completely green pool and really I was impressed with how well it worked. My pool had been neglected for over two weeks while I was away and by the time I got home the water was fully green with visible algae growth. I added two bags of this shock around the perimeter of the pool in the evening with the filter running and brushed the pool afterward to help make sure everything dissolved completely. By the next morning, the pool had already changed from swamp green to a cloudy blue. It was not crystal clear yet, but the algae was clearly dead and the transformation overnight was dramatic. At that point I backwashed and rinsed my sand filter and a crazy amount of algae flushed out. I continued filtering nonstop, brushed the walls again, skimmed debris, and used socks over the inlet ports to catch the finer dead algae particles. Throughout the day the socks kept collecting thick layers of fine algae residue so I rinsed them several times as the filter continued running. By the following morning I could clearly see the liner pattern at the bottom of the pool again. After another day of backwashing, brushing, vacuuming, skimming, and filtering, the pool was completely clear and ready for the family to enjoy again. I think it’s important to mention that bringing a green pool back takes patience no matter what brand of shock you use. This is not an instant one-hour fix but the product absolutely did its job and worked quickly once the filter system had time to remove all the dead algae. For reference, I used this in a soft sided above ground pool with a sand filter system. The attached photos show the pool before treatment, the morning after shocking, the second day of filtering and cleaning, then the final clear result on day 3. Pros: Worked quickly on a severely green pool Noticeable overnight improvement Killed algae effectively Dissolved well after brushing Worked well with a sand filter setup Cons: Restoring a neglected pool still takes time and repeated filtering/backwashing

## Frequently Bought Together

- HTH 52031 Swimming Pool Care Shock, Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo Formula, 13.3oz (Pack of 2)
- HTH 67084 Pool Care Algae Guard Advanced, All Algae Eliminator for Swimming Pools - Fast-Acting, Destroys & Prevents Green, Black & Mustard Algae, Keeps Pool Water Crystal Clear, 32 fl oz

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-06-06*