---
product_id: 22887003
title: "In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds"
brand: "in the swim"
price: "€ 461.76"
currency: EUR
in_stock: true
reviews_count: 8
category: "In The Swim"
url: https://www.desertcart.nl/products/22887003-in-the-swim-pool-shock-68-cal-hypo-granular-sanitizer
store_origin: NL
region: Netherlands
---

# 68% Cal-Hypo fast-acting power Crystal-clear water clarity Defends vs bacteria & algae In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds

**Brand:** in the swim
**Price:** € 461.76
**Availability:** ✅ In Stock

## Summary

> 💦 Shock Your Pool Into Crystal-Clear Perfection!

## Quick Answers

- **What is this?** In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds by in the swim
- **How much does it cost?** € 461.76 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/22887003-in-the-swim-pool-shock-68-cal-hypo-granular-sanitizer)

## Best For

- in the swim enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Application:** Granular formula dissolves quickly; just spread in the deepest pool area and brush if needed—no fuss, no stress.
- • **Rapid Algae Annihilation:** Experience lightning-fast pool shock that obliterates algae and harmful microorganisms, keeping your oasis pristine.
- • **Consistent Weekly Defense:** Maintain optimal 5-10 ppm chlorine levels with a simple 1-pound weekly dose per 10,000 gallons—pool care made easy.
- • **High-Potency Chlorine Boost:** Packed with 68% available chlorine for powerful sanitization that guarantees sparkling, safe water every swim.
- • **Universal Pool Compatibility:** Perfectly formulated for above ground, in-ground pools, spas, and hot tubs—versatility that fits your lifestyle.

## Overview

In The Swim Pool Shock delivers a potent 68% calcium hypochlorite granular formula designed for rapid and effective sanitization. Ideal for all pool types, it eliminates bacteria, algae, and microorganisms to maintain sparkling, safe water. Easy to apply and trusted by thousands, this 25-pound pack ensures your pool stays pristine with minimal effort.

## Description

desertcart.com : In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds : Calcium Hypochlorite Granular : Patio, Lawn & Garden

Review: Very good product - I’ve always been happy with In The Swim pool products and this is no exception. This along with a stabilizer keeps my chlorine levels in check. Tablets are made strong enough so that there is minimal breakage. They last a long time without breaking down.
Review: Works/ value - Good product and good price

## Features

- Fast-Acting Algae Control: Calcium Hypochlorite (Cal-Hypo) is an effective non-stabilized chlorine shock treatment, ideal for routine maintenance in your swimming pool
- Versatile Use: Suitable for above ground or in-ground swimming pools, spas, and hot tubs; Pre-dissolve or dilute to avoid bleaching the liner
- High Chlorine Content: 65% available chlorine, provides powerful sanitization for crystal-clear water
- Easy Application: Pre-dissolve or dilute to avoid bleaching swimming pool liners; Spread granules in the deepest part of the pool; Brush if needed
- Dosage: Use 1 Pound per 10,000 gallons weekly to maintain 5-10 ppm chlorine levels

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002WKJ6IS |
| Best Sellers Rank | #330 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #10 in Swimming Pool Chlorine |
| Brand | In The Swim |
| Customer Reviews | 4.7 4.7 out of 5 stars (15,787) |
| Item Form | Granular |
| Item Weight | 25 pounds |
| Item model number | 25237 |
| Manufacturer | In The Swim Discount Pool Supplies |
| Product Benefits | Kills Bacteria, Maintains Clean Sanitized Water |
| Product Dimensions | 13.2 x 13 x 12.2 inches |
| UPC | 815100020700 |
| Unit Count | 400 Ounce |

## Product Details

- **Brand:** In The Swim
- **Item Form:** Granular
- **Item Weight:** 25 Pounds
- **Product Benefits:** Kills Bacteria, Maintains Clean Sanitized Water
- **UPC:** 815100020700

## Images

![In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds - Image 1](https://m.media-amazon.com/images/I/51htGLF-wFL.jpg)
![In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds - Image 2](https://m.media-amazon.com/images/I/811jPJqAIGL.jpg)
![In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds - Image 3](https://m.media-amazon.com/images/I/814EaWrAK0L.jpg)
![In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds - Image 4](https://m.media-amazon.com/images/I/81+shZxa1mL.jpg)
![In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds - Image 5](https://m.media-amazon.com/images/I/81ItPt95j1L.jpg)

## Available Options

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

## Questions & Answers

**Q: How large are the tabs (3 inch or smaller) and how many tabs in each 50 lb bucket?**
A: Granules are not tabs.  They are coarse particles, about the consistency of hominy grits.  There are probably several million granules in a 50 lb. bucket.  I'm going to go out on a limb here and estimate that there are 50 lbs of them. 
 What I do is fill the scoop (it comes inside the bucket) with granules,  get 1 to 2 gallons of water from my pool in a 5 gal. plastic bucket and pour in the particles.  I stir them around with a stirrer made of a short length of PVC pipe and break up any clumps that have formed over time.  I pour the slurry into the pool at several different points.  The granules are not stabilized chlorine (which most tabs are) but calcium hypochlorite (same chemical as bleach).

**Q: I feel dumb, but I can't figure out how to open this bucket. I've tried jostling the red tab and turning but to no avail. Any tips?**
A: I had this issue the first time as well.  Examine the red lock tab to see how it locks into place by falling into those holes.  You need to pull up on that.  Thing is, mine had already been pulled up.  So instead of concentrating my energy on that I stood up, grabbed the top of the bucket with both hands and turned it left in order to open it.  Simply grabbing it from the side with one hand was not enough the first time so you'll need both hands and grab from the top.  Have another person hold the red tab up at the same time and it should open easily.

**Q: Does this product contain a cyanide-based UV stablizer?**
A: It does not contain stabilizer.

**Q: can be used for potable/drinkable water and if it falls under NSF Standard 60?**
A: Haha! That's a good one! It works great for pool water.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very good product
*by J***F on February 26, 2026*

I’ve always been happy with In The Swim pool products and this is no exception. This along with a stabilizer keeps my chlorine levels in check. Tablets are made strong enough so that there is minimal breakage. They last a long time without breaking down.

### ⭐⭐⭐⭐⭐ Works/ value
*by L***N on February 20, 2026*

Good product and good price

### ⭐⭐⭐⭐⭐ Consistent, effective, satisfied.
*by B***R on March 1, 2026*

OH BABY, worked as expected.

## Frequently Bought Together

- In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 25 Pounds
- In The Swim 3 Inch Stabilized Chlorine Tablets for Sanitizing Swimming Pools - Individually Wrapped, Slow Dissolving - 90% Available Chlorine - Tri-Chlor - 50 Pounds
- Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-03-17*