---
product_id: 540157722
title: "HTH 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (1 Pack)"
brand: "hth"
price: "248 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/540157722-hth-52039-swimming-pool-care-shock-ultra-swimming-pool-chemical
store_origin: DK
region: Denmark
---

# Prevents algae & stains Fast-acting chlorine boost Visible blue action indicator HTH 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (1 Pack)

**Brand:** hth
**Price:** 248 kr
**Availability:** ✅ In Stock

## Summary

> 💦 Shock Your Pool to Sparkle-Perfection!

## Quick Answers

- **What is this?** HTH 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (1 Pack) by hth
- **How much does it cost?** 248 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/540157722-hth-52039-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

- • **All-Pool Compatible:** Safe and effective for vinyl, saltwater, and all pool types—universal pool care.
- • **Complete Pool Health:** Prevents bacteria, algae, stains, and scale while improving filtration and water softness.
- • **Blue Action Assurance:** Unique blue color shows the shock is actively working—no guesswork needed.
- • **Gentle on Skin & Eyes:** Formulated to reduce irritation, so your swim stays refreshing and comfortable.
- • **Sparkling Clarity, Fast:** Boost chlorine levels quickly for a crystal-clear pool in 24 hours.

## Overview

The 52039 Swimming Pool Care Shock Ultra uses a powerful Cal Hypo formula to rapidly sanitize and clarify all pool types without adding cyanuric acid, preventing chlorine lock. Its visible blue action indicator confirms effectiveness, while its gentle formula reduces skin and eye irritation. Compatible with vinyl and saltwater pools, it tackles 90% of common pool problems within 24 hours, ensuring a brilliantly clear, soft, and healthy swimming environment.

## Description

HTH 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (1 Pack)

## Features

- BENEFIT: Use this all-in-one powerhouse pool shock to increase chlorine levels, prevent bacteria, algae, stain, and scale, reduce skin and eye irritation, improve filtration, and soften your swimming pool water quickly and easily
- VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
- VISIBLE BLUE ACTION: This built-in feature lets you know the product is working
- 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; Use weekly to solve 90% of pool problems within 24 hours and restore crystal clarity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 2.54 x 11.43 x 27.94 cm; 453.59 g |
| Part number | 52039 |
| Material type | Plastic |
| Power source type | hand_powered |
| Department | Unisex-Adult |
| Manufacturer | Innovative Water Care |
| Item model number | 52039 |
| ASIN | B09R81TC25 |

## Product Details

- **Brand:** HTH
- **Item weight:** 1 Pounds
- **Item form:** Powder
- **Product benefits:** Kills Bacteria
- **UPC:** 073187520395

## Images

![HTH 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (1 Pack) - Image 1](https://m.media-amazon.com/images/I/71ZLNIYD2UL.jpg)

## Available Options

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

## Questions & Answers

**Q: if this turns blue to show it is working does the water remain blue or return to clear ?**
A: Ours has always turned clear.

**Q: Can you use this in a hot tub?**
A: There are smaller containers of shock that are reclosable and more convenient for the spa/hot tub. This package is meant for use in a large volume of water/one time use and should not be divided as the product could retain moisture or become contaminated and cause some off-gassing. Look for the shock in bottles with a lid specifically for spas, hot tubs and small pools. If you have further questions, give our team a call at 866-484-7665.

**Q: Does this get rid of the algae?**
A: The HTH Pool Care Shock is one of the most important parts of pool care maintenance to keep your water safe, clean and algae free.  We would also recommend you use one of the HTH Pool Care Algae Guard products as part of your regular maintenance too.  The Algae Guards can be part of the initial set up and weekly maintenance to make sure you keep the algae at bey.   If you have other questions, or need more info, please contact us at 866-484-7665, or chat with us thru the HTHPOOLS.com website.  We're Here To Help!

**Q: how much do i use to make a gallon of bleach?**
A: Friend, this pack of HTH Pool Care Shock is a ONE TIME USE for 10,000-12,000 gallons of water. It is not meant to be pre-mixed as that can be very dangerous due to potential off-gassing. Please ONLY follow the label directions for adding this to your swimming pool.   If you need any further information or clarification about this or other HTH products, feel free to give us a call at 866-484-7665. We're Here To Help!

## Frequently Bought Together

- HTH 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (1 Pack)
- Clorox Pool&Spa XTRABLUE 3” Chlorinating Tablets, Individually Wrapped, Kills Bacteria & Stops Algae (5 LB)
- Clorox® Pool&Spa™ Swimming Pool Algaecide, Prevents and Treats Pool Algae, Non-Foaming, 1 Quart (Pack of 1)

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**Shop now:** [https://www.desertcart.dk/products/540157722-hth-52039-swimming-pool-care-shock-ultra-swimming-pool-chemical](https://www.desertcart.dk/products/540157722-hth-52039-swimming-pool-care-shock-ultra-swimming-pool-chemical)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-29*