---
product_id: 724940680
title: "HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack)"
brand: "hth"
price: "3319457₫"
currency: VND
in_stock: false
url: https://www.desertcart.vn/products/724940680-hth-52040b-swimming-pool-care-shock-ultra-swimming-pool-chemical
store_origin: VN
region: Vietnam
---

# Fast-acting chlorine boost Visible blue action indicator Cal-Hypo formula, no chlorine lock HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack)

**Brand:** hth
**Price:** 3319457₫
**Availability:** ❌ Out of Stock

## Summary

> 💦 Shock Your Pool to Perfection—See the Blue, Feel the Clean!

## Quick Answers

- **What is this?** HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack) by hth
- **How much does it cost?** 3319457₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/724940680-hth-52040b-swimming-pool-care-shock-ultra-swimming-pool-chemical)

## 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

- • **Visible Blue Action:** Instantly know the shock is working with a unique blue indicator—no guesswork needed.
- • **Safe for All Pool Types:** Perfectly compatible with vinyl-lined and saltwater pools, ensuring universal pool care.
- • **Powerful All-in-One Shock:** Elevate pool hygiene by eliminating bacteria, algae, and grime with a single treatment.
- • **Reduces Skin & Eye Irritation:** Gentle on swimmers while tough on contaminants, making every swim comfortable.
- • **Crystal Clear Water in 24 Hours:** Experience visibly brilliant, softened water that invites you to dive in.

## Overview

HTH 52040B Swimming Pool Care Shock Ultra is a 1 lb cal-hypo based chlorine shock designed to rapidly disinfect and clarify all types of swimming pools. Its unique visible blue action confirms effectiveness while preventing chlorine lock by excluding cyanuric acid. Safe for vinyl and saltwater pools, it reduces skin and eye irritation and restores crystal-clear water within 24 hours of weekly use.

## Description

Product Description               HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Calhypo Formula, 1 lb (6 Pack)                  Directions               Apply directly to the pool or through skimmer according to directions

## Features

- Benefits: Use this all-in-one powerhouse spool shock to increase the level of chlorine and prevent bacteria, algae, dirt and grime, reduce skin and eye irritation, improve filtration and soften swimming pool water quickly and easily
- VISIBLE AND BRILLIANT SHINE: This calhypo based formula disinfects without the added cyanuric acid (CYA) to prevent excess stabilization and chlorine lock
- VISIBLE BLUE ACTION: This built-in feature lets you know that the product is working
- FITS ALL SWIMMING POOLS: This product is perfect for all types of pools, including vinyl-lined pools and saltwater systems
- CLEAR EVERYTH: For best results, test and balance your swimming pool water twice a week with HTH 6-way test strip. Solves pool problems and restores crystal clarity within 24 hours after weekly use

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Department | Uni Adult |
| Manufacturer | Innovative Water Care |
| Item model number | 52040B |
| Product Dimensions | 11.43 x 26.67 x 26.67 cm; 2.86 kg |
| ASIN | B09R81TQBS |

## Product Details

- **Brand:** HTH
- **Item Weight:** 2.86 kg
- **Item Form:** Granular
- **Product Benefits:** Kills Bacteria
- **UPC:** 073187520401

## Images

![HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack) - Image 1](https://m.media-amazon.com/images/I/81aKILdYRbL.jpg)
![HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack) - Image 2](https://m.media-amazon.com/images/I/81lT7q44+SL.jpg)
![HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack) - Image 3](https://m.media-amazon.com/images/I/71RYVlIPduL.jpg)
![HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack) - Image 4](https://m.media-amazon.com/images/I/81v6v8TEYIL.jpg)
![HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1 lb (6 Pack) - Image 5](https://m.media-amazon.com/images/I/716YqOgZNjL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this replace weekly chlorine?**
A: This is a sanitizer that is used as weekly shock or your regular sanitizer maintenance.  The amount you use for weekly shock and the amount for maintenance is different based upon the pool water volume.  Ideally, this is used for Shock but we can help with regular maintenance dose if you choose to not use a tablet  in your skimmer.  Please consider calling our Consumer Engagement Team for more precise recommendations and dosing details.  We're available M-F, 9 AM - 7 PM at 866-484-7665.

**Q: What is the percentage of available chlorine?**
A: This product has 56.44% available chlorine.

**Q: How long do you have to wait after adding shock before you can swim?**
A: The general rule is to wait at least an hour per pound of granular product, to allow it to dissolve and dilute properly. Before you enter the pool, make sure to test and that the chlorine level is between 1-4 ppm (and NOT ABOVE 5 ppm) for the safest swimming.

**Q: 1 bag treats how many gallons water**
A: We are the manufacturer of HTH® Pool Care Shock Ultra and one of our 1 lb. bags treats 13,500 gallons of swimming pool water. If you have any more questions just give us a call at 866-484-7665.

## Frequently Bought Together

- HTH 52040B Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula, 1lb (6 Pack)
- HTH 67067 Swimming Pool Care Clarifier Advanced - Crystal Clear Water in 24 Hours
- HTH 52038 Swimming Pool Care Green to Blue, Advanced Shock System, 2-Step Swimming Pool Care Solution, 1 Kit

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**Shop now:** [https://www.desertcart.vn/products/724940680-hth-52040b-swimming-pool-care-shock-ultra-swimming-pool-chemical](https://www.desertcart.vn/products/724940680-hth-52040b-swimming-pool-care-shock-ultra-swimming-pool-chemical)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-18*