---
product_id: 690229473
title: "52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (4 Pack)"
brand: "hth"
price: "$121.38"
currency: USD
in_stock: true
category: "Hth"
url: https://www.desertcart.us/products/690229473-52039-swimming-pool-care-shock-ultra-swimming-pool-chemical-cal
store_origin: US
region: United States of America
---

# Fast-dissolving Cal Hypo formula Visible Blue Action confirms effectiveness Prevents algae, bacteria, stains & scale 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (4 Pack)

**Brand:** hth
**Price:** $121.38
**Availability:** ✅ In Stock

## Summary

> 💦 Shock Your Pool to Sparkle-Perfection—Because Your Summer Deserves Crystal Clear!

## Quick Answers

- **What is this?** 52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (4 Pack) by hth
- **How much does it cost?** $121.38 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/690229473-52039-swimming-pool-care-shock-ultra-swimming-pool-chemical-cal)

## 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

- • **Smart Pool Care Routine:** Pair with HTH 6-Way Test Strips for precise water balance and solve 90% of pool problems weekly.
- • **See It Work in Real-Time:** Unique Visible Blue Action lets you watch your pool care in action—confidence in every splash.
- • **All-in-One Weekly Powerhouse:** Kills bacteria & algae, prevents stains & scale, reduces irritation, and softens water in just 24 hours.
- • **Universal Pool Compatibility:** Safe for all pool types including vinyl liners and saltwater systems—one solution for every pool owner.
- • **Sparkling Clarity, No Chlorine Lock:** Cal Hypo formula boosts chlorine without cyanuric acid buildup for crystal-clear water all season.

## Overview

HTH 52039 Shock Ultra is a fast-acting, Cal Hypo based pool sanitizer that elevates chlorine levels without adding cyanuric acid, preventing chlorine lock and algae growth. Its visible blue action confirms effectiveness while safely treating all pool types. This 4-pack weekly formula kills bacteria and algae, prevents stains and scale, reduces skin and eye irritation, and improves filtration—delivering sparkling, soft water within 24 hours.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DC8669GD |
| Best Sellers Rank | #35 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Swimming Pool Chlorine |
| Brand Name | HTH |
| Customer Reviews | 4.8 4.8 out of 5 stars (1,178) |
| Item Form | Powder |
| Item Type Name | Swimming Pool Chemical Prevents Bacteria, Algae, Stain & Scale, Cal Hypo Formula |
| Item Weight | 4 Pounds |
| Manufacturer | Innovative Water Care |
| Manufacturer Part Number | 52039 |
| Model Number | 52039 |
| Number of Items | 4 |
| Product Benefits | Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water, Prevents Stains |
| Unit Count | 64.0 Ounce |

## Product Details

- **Brand:** HTH
- **Item Form:** Powder
- **Item Weight:** 4 Pounds
- **Number of Items:** 4
- **Product Benefits:** Controls Algae, Kills Bacteria, Maintains Clean Sanitized Water, Prevents Stains

## Images

![52039 Swimming Pool Care Shock Ultra, Swimming Pool Chemical, Cal Hypo Formula (4 Pack) - Image 1](https://m.media-amazon.com/images/I/81qdtai1WAL.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.us/products/690229473-52039-swimming-pool-care-shock-ultra-swimming-pool-chemical-cal](https://www.desertcart.us/products/690229473-52039-swimming-pool-care-shock-ultra-swimming-pool-chemical-cal)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-20*