---
product_id: 657516162
title: "DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack"
brand: "drytec"
price: "S$359"
currency: SGD
in_stock: true
reviews_count: 5
category: "Dry Tec"
url: https://www.desertcart.sg/products/657516162-drytec-1-1901-12-calcium-hypochlorite-pool-shock-1-pound
store_origin: SG
region: Singapore
---

# 1 bag treats 10,000 gallons 68% Calcium Hypochlorite purity 12-pack, 1 lb each DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack

**Brand:** drytec
**Price:** S$359
**Availability:** ✅ In Stock

## Summary

> 💧 Shock your pool, not your schedule — crystal clarity made simple!

## Quick Answers

- **What is this?** DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack by drytec
- **How much does it cost?** S$359 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/657516162-drytec-1-1901-12-calcium-hypochlorite-pool-shock-1-pound)

## Best For

- drytec enthusiasts

## Why This Product

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

## Key Features

- • **Complete 12-Pack Supply:** Stock up and shock your pool weekly for consistent freshness
- • **Optimized Water Balance:** Maintain pH 7.2-7.6 & alkalinity 60-120 for swimmer comfort and peak performance
- • **Easy Evening Application:** Broadcast evenly during filter pump operation for hassle-free superchlorination
- • **Powerful 68% Calcium Hypochlorite:** Delivers maximum sanitizing punch for crystal-clear water
- • **Precision Dosage for 10,000 Gallons:** One bag per 10,000 gallons ensures perfect chlorine levels every time

## Overview

DryTec 1-1901-12 Calcium Hypochlorite Pool Shock is a high-purity (68%) granular chlorine treatment designed to superchlorinate and sanitize pools efficiently. Each 1-pound bag treats up to 10,000 gallons, maintaining 5-10 ppm available chlorine to control bacteria, contaminants, and algae. The 12-pack ensures weekly shock treatments for a full season of crystal-clear, balanced water with optimal pH and alkalinity levels.

## Description

Product Description Use entire contents of bag when opened. If any granules settle to the bottom of the pool use brush to disperse. Add the recommended dosage of this product during evening hours while the filter pump is running. When adding this product to your pool, broadcast the product evenly over a wide area in the deepest part of the pool. If any granules settle to the bottom of the pool use brush to disperse. Water Balance: For best product performance, swimmer comfort, and crystal clear water: Maintain pH in the range of 7.2 to 7.6. Maintain total alkalinity in the range of 60 to 120. Maintain calcium hardness above 200 ppm. Use a reliable test kit that measures all these ranges. Use Pool Care Products to make adjustments. Follow label directions for each product. Do not enter pool until the free available chlorine residual is 1- 4 ppm for each of the below noted water treatment applications. OPENING YOUR POOL: For best results, see the Water Balance section above before treatment. Always adjust and maintain pH in the 7.2 to 7.6 range. Follow "SHOCK TREATMENT / SUPERCHLORINATION" directions on this package. Allow 30 minutes for product to disperse. Test free available chlorine residual with a pool test kit. Repeat treatment as needed. ROUTINE CHLORINATION: For best results, see Water Balance section above before treatment. Throughout the pool season, adjust and maintain pH at 7.2-7.6. Check available chlorine with a suitable test kit.SHOCK TREATMENT / SUPERCHLORINATION: Every 7 days, or as necessary to prevent pool problems, shock treat /superchlorinate the pool by adding one bag of this product per 10,000 gallons of water to provide 5 to 10 ppm available chlorine. Additional shock treatments may be required to correct problems which are caused by visible algae, high bathing loads, heavy wind and rainstorms. Additional shock treatments may also be required to correct problems such as unpleasant odors and eye irritation. Check the available chlorine with a suitable test kit. Directions 1. Add one bag of the product per 10,000 gallons of water. 2. Adjust and maintain pH at 7.2-7.6 and total alkalinity in the range of 60 to 120. 3. Pre-dilute shock into a bucket of warm water or continuously brush the granules around until fully dissolved to prevent liner bleaching. 4. Evenly distribute the product around the pool.

Review: Great value
Review: Awesome produvt

## Features

- Causes severe skin burns and eye damage.
- Harmful if swallowed.
- May cause respiratory irritation.
- May intensify fire; oxidiser.
- Toxic if inhaled.
- Use biocides safely. Always read the label and product information before use.
- One bag of this product per 10,000 gallons of water
- Adjust and maintain pH at 7.2-7.6
- Maintain total alkalinity in the range of 60 to 120
- One bag of this product per 10,000 gallons of water provides 5 to 10 ppm available chlorine
- 68% Calcium Hypochlorite

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00U2NORTU |
| Benefits | Controls Bacteria,Contaminants,Prevents Algae |
| Best Sellers Rank | 478,448 in Garden ( See Top 100 in Garden ) 1,551 in Chlorine |
| Brand | DryTec |
| Brand Name | DryTec |
| Customer Reviews | 4.6 out of 5 stars 1,373 Reviews |
| Item Form | Granular |
| Item Weight | 5.44 kg |
| Item form | Granular |
| Item height | 7 inches |
| Item weight | 5.44 kg |
| Number of items | 12 |
| Product benefits | Controls Bacteria,Contaminants,Prevents Algae |
| UPC | 034261119010 |
| Unit Count | 12.0 count |

## Images

![DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack - Image 1](https://m.media-amazon.com/images/I/71NKHt2yLNL.jpg)
![DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack - Image 2](https://m.media-amazon.com/images/I/71Zui32r9cL.jpg)
![DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack - Image 3](https://m.media-amazon.com/images/I/81Wqgr3PaGL.jpg)
![DryTec 1-1901-12 Calcium Hypochlorite Pool Shock, 1-Pound, 12-Pack - Image 4](https://m.media-amazon.com/images/I/91QtUsZZDpL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great value
*by H***N on 9 January 2026*



### ⭐⭐⭐⭐⭐ Awesome produvt
*by B***D on 13 August 2025*



### ⭐⭐⭐⭐⭐ Go-To Pool Shock
*by L***G on 28 August 2025*



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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-01-27*