---
product_id: 39003756
title: "Winter Swimming Pool Algaecide - 1 Quart"
brand: "in the swim"
price: "HK$454"
currency: HKD
in_stock: true
reviews_count: 8
category: "In The Swim"
url: https://www.desertcart.hk/products/39003756-winter-swimming-pool-algaecide-1-quart
store_origin: HK
region: Hong Kong
---

# Long-lasting seasonal protection Safe for all pool surfaces Winter-proof algae defense Winter Swimming Pool Algaecide - 1 Quart

**Brand:** in the swim
**Price:** HK$454
**Availability:** ✅ In Stock

## Summary

> ❄️ Winter-proof your pool, so you never miss a splash come spring!

## Quick Answers

- **What is this?** Winter Swimming Pool Algaecide - 1 Quart by in the swim
- **How much does it cost?** HK$454 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/39003756-winter-swimming-pool-algaecide-1-quart)

## 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

- • **Trusted by Thousands:** Highly rated with 4.7 stars and proven to eliminate algae quickly, making winter pool care worry-free.
- • **Freeze-Resistant Formula:** Keeps algae at bay even under ice and snow, ensuring your pool stays pristine all winter long.
- • **Universal Surface Safety:** Compatible with vinyl, plaster, fiberglass, and all filtration systems—no stains, no damage.
- • **Effortless Spring Opening:** Prevents stubborn algae blooms so you skip costly cleanups and dive into the season faster.
- • **One-Time Application, Season-Long Peace:** Apply once before closing and enjoy a crystal-clear pool come spring without the stress.

## Overview

In The Swim Winter Swimming Pool Algaecide is a powerful, cold-weather formula designed to prevent algae growth throughout the winter months. Safe for all pool surfaces and filtration systems, it ensures hassle-free spring openings by keeping your pool water clear and algae-free with just one application.

## Description

desertcart.com : In The Swim Winter Swimming Pool Algaecide - 1 Quart : Swimming Pool Winterizing Chemicals : Patio, Lawn & Garden

Review: The Swim Winter Swimming Pool Algaecide reall works. - I highly recommend The Swim Winter Swimming Pool Algaecide. All the stains disappeared in about two days. The green went away,
Review: It works beautifully - I'm very pleased with this. I'd been fighting algae for the last 2 years. Even though I had been super shocking it , it came right back because I forgot to add algaecide after the chlorine level dropped... That's on me. So as I was putting it up for the winter I added this and I didn't want to close it. Lol It's not looked that good in awhile.

## Features

- Winter Long Protection – Specially formulated winter algaecide provides a strong defense against algae growth during the cold months, keeping your pool water clean, clear, and free from costly springtime surprises.
- Simplify Opening Season – By preventing stubborn algae blooms before they start, you’ll avoid expensive cleanups, extra shock treatments, and wasted opening weeks, making pool start-up fast and hassle-free.
- Works in Cold, Harsh Conditions – Unlike regular treatments that lose strength as water temperatures drop, this winter formula remains active under ice and snow, giving you continuous protection all season.
- Safe for All Pool Surfaces & Systems – Compatible with vinyl, plaster, fiberglass, and all filtration systems, this non-foaming winter algaecide protects without staining, bleaching, or disrupting your pool’s balance.
- Peace of Mind Through Spring – One easy application before closing locks in protection, so you can enjoy the off-season stress-free knowing your pool will be crystal clear and swim-ready when warm weather returns.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002WKQ0PU |
| Best Sellers Rank | #34,290 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #29 in Swimming Pool Algaecides |
| Brand | In The Swim |
| Customer Reviews | 4.7 4.7 out of 5 stars (831) |
| Item Form | Liquid |
| Item Weight | 2.6 pounds |
| Item model number | C050001012AE |
| Manufacturer | In The Swim Discount Pool Supplies |
| Product Benefits | Controls Algae |
| Product Dimensions | 9.8 x 3.1 x 3 inches |
| UPC | 758293053424 |
| Unit Count | 32 Fluid Ounces |

## Product Details

- **Brand:** In The Swim
- **Item Form:** Liquid
- **Item Weight:** 2.6 Pounds
- **Product Benefits:** Controls Algae
- **UPC:** 758293053424

## Images

![Winter Swimming Pool Algaecide - 1 Quart - Image 1](https://m.media-amazon.com/images/I/61Oz-0rmXrL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can you use in summer? My pool man left 2 quarts behind last year**
A: Would save for winter

**Q: I'm not sure why this isn't shipped to ca, is it sold in stores in ca?**
A: Yes u can purchase in California

**Q: Would you have to add this BEFORE lowering the water level? Otherwise, how would you be able to run the filter to circulate product, as instructed??**
A: I always add it after water is lowered, just pour it around pool and it worked fine for us

**Q: Does it contain cooper?**
A: yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ The Swim Winter Swimming Pool Algaecide reall works.
*by R***. on January 10, 2026*

I highly recommend The Swim Winter Swimming Pool Algaecide. All the stains disappeared in about two days. The green went away,

### ⭐⭐⭐⭐⭐ It works beautifully
*by L***. on September 11, 2025*

I'm very pleased with this. I'd been fighting algae for the last 2 years. Even though I had been super shocking it , it came right back because I forgot to add algaecide after the chlorine level dropped... That's on me. So as I was putting it up for the winter I added this and I didn't want to close it. Lol It's not looked that good in awhile.

### ⭐⭐⭐⭐⭐ Quality Products
*by A***. on September 4, 2025*

I have been buying Pool Life products for several years and have always been satisfied with them. I just purchased Winterizing Algaecide, and while I haven’t used it yet, I am confident that it will work as well as their other products. Cost was good and shipping was fast. Very pleased with this purchase.

## Frequently Bought Together

- In The Swim Winter Swimming Pool Algaecide - 1 Quart
- In The Swim Pool Closing Kit - Winterizing Chemicals for Above Ground and In-Ground Pools - Up to 15,000 Gallons
- SeaKlear AquaPill WinterPill Pool Clarifier and Enzyme up to 30,000 Gallons 91222APL

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**Shop now:** [https://www.desertcart.hk/products/39003756-winter-swimming-pool-algaecide-1-quart](https://www.desertcart.hk/products/39003756-winter-swimming-pool-algaecide-1-quart)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-21*