---
product_id: 19409425
title: "Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds"
brand: "crystal blue"
price: "KSh23256"
currency: KES
in_stock: true
reviews_count: 8
category: "Crystal Blue"
url: https://www.desertcart.co.ke/products/19409425-crystal-blue-copper-sulfate-algaecide-granular-aquatic-grade-copper-sulfate
store_origin: KE
region: Kenya
---

# Ideal for large water bodies, not small ponds Targets actively growing algae above 60°F 99% pure Copper Sulfate Pentahydrate Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds

**Brand:** crystal blue
**Price:** KSh23256
**Availability:** ✅ In Stock

## Summary

> 🌿 Clear your pond, clear your mind — algae doesn’t stand a chance!

## Quick Answers

- **What is this?** Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds by crystal blue
- **How much does it cost?** KSh23256 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/19409425-crystal-blue-copper-sulfate-algaecide-granular-aquatic-grade-copper-sulfate)

## Best For

- crystal blue enthusiasts

## Why This Product

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

## Key Features

- • **Trusted & Proven:** Top-ranked pond treatment with thousands of satisfied users and glowing reviews.
- • **Aquatic Grade Purity:** 99% pure granular formula ensures maximum potency and consistent results.
- • **Powerful Algae Control:** Effectively eliminates filamentous and string algae for crystal-clear water.
- • **Optimized for Large Ponds:** Designed specifically for expansive water bodies, not small decorative ponds or pools.
- • **Safe Application Guidelines:** Use carefully to avoid oxygen depletion and protect sensitive fish species.

## Overview

Crystal Blue Copper Sulfate Algaecide is a premium 99% pure granular copper sulfate pentahydrate formula designed for effective algae control in large ponds and water bodies. It targets actively growing algae species above 60°F, clearing thick floating mats while requiring careful application to protect aquatic life. Trusted by thousands, it’s a top-rated solution for maintaining pristine, algae-free water.

## Description

desertcart.com : Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds : Pond Water Treatments : Patio, Lawn & Garden

Review: This is a great product ! - I have a 400 gallon pond with a waterfall and I always had an algae issue until I bought this. I know I poured a little too much in but I was thinking "what the heck". The pond was cloudy for a few days and then it cleared the water up and now it looks fantastic! Crystal clear. What a great product ! I would highly recommend this to anyone who has a pond with an algae problem !!!
Review: Copper Sulfate Algaecide - Does the job. Distribute through your toilets. Keeps those lines clear of roots as well as the septic itself.

## Features

- 99% Copper Sulfate Pentahydrate. To be used for large bodies of water, not small decorative ponds, water features, or pools.
- Controls most species of algae like filamentous, string algae and swimmers itch. Copper Sulfate should be used as a pond algae treatment on actively growing algae in water temperature above 60F.
- Most effective when cast out on top of thick floating algae mats. Be aware of how much vegetation you are treating at one time. Eliminating too much at once can deplete the oxygen levels too quickly for your fish.
- Granular Copper Sulfate, 5 lbs
- DO NOT use in bodies of water that include Koi, Goldfish, Trout, or Grass Carp. These types of fish are sensitive to copper sulfate products.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000RUN0T6 |
| Best Sellers Rank | #8,338 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #18 in Water Garden & Pond Treatment |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,358) |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.93 pounds |
| Item model number | 333 |
| Manufacturer | Sanco Industries |
| Product Dimensions | 4 x 4 x 10 inches |

## Product Details

- **Brand:** Crystal Blue
- **Item Form:** Granules
- **Liquid Volume:** 5 Liters
- **Manufacturer:** Sanco Industries
- **UPC:** 768980003335

## Images

![Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds - Image 1](https://m.media-amazon.com/images/I/81cWa2gCfkL.jpg)

## Questions & Answers

**Q: Is copper safe to use with fish?**
A: This product is safe for livestock, recreation, potable water and not harmful to most fish when used according to label directions. There are a few exceptions, Copper sulfate is not meant for small deco ponds and is toxic to Koi, Golfish and Trout.

**Q: How often should I use Copper Sulfate?**
A: Copper sulfate algae control should be used when algae is present. Wait 14 days between applications and only treat a 1/2 or 1/3 of the pond at a time to recover oxygen levels.

**Q: How do I apply this product?**
A: Apply by casting granulars, dragging behind boat in burlap, or dissolve and spray.

**Q: How much product do I use?**
A: 1.8 lbs of copper will treat up to 15,000 square feet.

**Q: When is the best time to treat my pond algae?**
A: Pond algae should be treated when algae is actively growing and water temperatures are above 60F.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This is a great product !
*by M***H on August 3, 2025*

I have a 400 gallon pond with a waterfall and I always had an algae issue until I bought this. I know I poured a little too much in but I was thinking "what the heck". The pond was cloudy for a few days and then it cleared the water up and now it looks fantastic! Crystal clear. What a great product ! I would highly recommend this to anyone who has a pond with an algae problem !!!

### ⭐⭐⭐⭐⭐ Copper Sulfate Algaecide
*by F***Y on December 2, 2025*

Does the job. Distribute through your toilets. Keeps those lines clear of roots as well as the septic itself.

### ⭐⭐⭐⭐⭐ Does what it says it will do
*by C***E on November 16, 2025*

Works very quickly, easy to use. Wear a mask when spreading this! It got rid of a snail and parasite problem within hours!

## Frequently Bought Together

- Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds
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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-25*