---
product_id: 456879903
title: "Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs."
brand: "coral seas"
price: "R1550"
currency: ZAR
in_stock: true
reviews_count: 7
category: "Coral Seas"
url: https://www.desertcart.co.za/products/456879903-yellow-out-swimming-pool-chlorine-shock-enhancing-treatment-2-lbs
store_origin: ZA
region: South Africa
---

# Boosts chlorine shock efficiency Gentle algae removal, no harsh chemicals Works at high pH (7.8+) Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs.

**Brand:** coral seas
**Price:** R1550
**Availability:** ✅ In Stock

## Summary

> 🌊 Shock your pool into crystal-clear perfection with Yellow Out!

## Quick Answers

- **What is this?** Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs. by coral seas
- **How much does it cost?** R1550 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/456879903-yellow-out-swimming-pool-chlorine-shock-enhancing-treatment-2-lbs)

## Best For

- coral seas enthusiasts

## Why This Product

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

## Key Features

- • **High pH Hero:** Optimized for pools with elevated pH, including plaster and salt systems
- • **Effortless Application:** No brushing needed—just add and watch your pool transform
- • **Chlorine Shock Amplifier:** Supercharges your pool’s chlorine for rapid algae elimination
- • **Eco-Friendly Algae Fighter:** Safely removes green, yellow, brown, and pink algae without toxic chemicals
- • **Universal Pool Compatibility:** Perfect for all pool surfaces, including vinyl liners and salt chlorine generators

## Overview

Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment is a 2 lb powerhouse designed to boost chlorine shock effectiveness, especially in pools with high pH levels or salt chlorine generators. It safely and gently removes multiple algae types without harsh chemicals, is easy to use with no brushing required, and is compatible with all pool surfaces including vinyl liners and plaster finishes.

## Description

Product description Use 2 lbs of Yellow Out per 15,000 gallons of water prior to shock treatment with an EPA-registered chlorine that kills yellow algae. Yellow Out works great for all pools, including those with salt chlorine generators and plaster finishes. Both of these circumstances can create a higher pH in pool water (especially newer plaster), which happens to be the ideal condition in which Coral Seas products work. The recommended pH level is 7.8 or higher for ideal performance. This is opposite of traditional algae treatment methods which require a lower pH for chlorine to be more efficient. Yellow Out are also not affected by higher levels of cyanuric acid. Directions Use 2 lbs of Yellow Out per 15,000 gallons of water prior to shock treatment with an EPA-registered chlorine that kills yellow algae. Yellow Out works great for all pools, including those with salt chlorine generators and plaster finishes.

Review: It works!! - Most important thing to know is that it works for our pool while chlorine alone did not.
Review: Didn't work. - Too expensive. Didn't work.

## Features

- Compatible with pools operating a chlorine generator
- Simple to use, requires no brushing, and cleans up algae gently without the use of harsh chemicals
- Used in conjunction with pool shock to safely remove green, yellow, brown, and pink algae from your pool
- Safe, non-toxic and can be used on all pool surfaces, including vinyl liners

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002WKO6U6 |
| Best Sellers Rank | 156,748 in Garden ( See Top 100 in Garden ) 700 in Chlorine |
| Customer Reviews | 4.2 4.2 out of 5 stars (1,745) |
| Date First Available | 3 Dec. 2009 |
| Item display height | 3.7 inches |
| Item display length | 6 inches |
| Item display weight | 998 g |
| Item display width | 4 inches |
| Item model number | FBA_YO-2# |
| Manufacturer | Coral Seas |
| Part number | FBA_YO-2# |
| Product Dimensions | 15.24 x 10.16 x 9.4 cm; 907.18 g |

## Product Details

- **Brand:** Coral Seas
- **Item form:** Liquid
- **Item weight:** 907 g
- **Product benefits:** algae
- **UPC:** 040053230375

## Images

![Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs. - Image 1](https://m.media-amazon.com/images/I/41LBajIsAwL.jpg)
![Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs. - Image 2](https://m.media-amazon.com/images/I/41Y7p6DikGL.jpg)
![Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs. - Image 3](https://m.media-amazon.com/images/I/51+QhkO01YL.jpg)
![Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs. - Image 4](https://m.media-amazon.com/images/I/51PiDRkOe3L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works!!
*by E***I on 11 January 2025*

Most important thing to know is that it works for our pool while chlorine alone did not.

### ⭐⭐ Didn't work.
*by S***R on 3 August 2025*

Too expensive. Didn't work.

### ⭐⭐⭐⭐⭐ Review
*by F***O on 7 January 2026*

iving in Texas, I deal with stubborn dark yellow algae on my pool walls every single year. It doesn't seem to matter how much work I put into keeping the pH and chlorine levels exactly right—the yellow spots always find a way back. This Yellow Out treatment is the only thing that actually works for me. When you follow the shock process described on the bottle, it cleans everything up completely. The best part is that I barely have to brush the walls at all; the chemicals do the heavy lifting, and the pool looks back to new in no time. If you’re tired of fighting mustard algae that won't go away with regular chlorine, this is definitely the solution.

## Frequently Bought Together

- Yellow Out Swimming Pool Chlorine Shock Enhancing Treatment - 2 lbs.
- HTH 52037R Pool Care Shock Advanced, Swimming Pool Chemical - Cal Hypo Formula, Prevents Bacteria & Algae, Restores Crystal Clear Water - Shock Treatment, 1lb (12 Pack)
- PoolRX+ pool unit 7.5k-20k gallons

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**Shop now:** [https://www.desertcart.co.za/products/456879903-yellow-out-swimming-pool-chlorine-shock-enhancing-treatment-2-lbs](https://www.desertcart.co.za/products/456879903-yellow-out-swimming-pool-chlorine-shock-enhancing-treatment-2-lbs)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-02*