---
product_id: 50920395
title: "Copper Sulfate Small Crystals 50lb Bag"
brand: "copper sulfate crystals"
price: "€ 981.86"
currency: EUR
in_stock: true
reviews_count: 8
category: "Copper Sulfate Crystals"
url: https://www.desertcart.at/products/50920395-copper-sulfate-small-crystals-50lb-bag
store_origin: AT
region: Austria
---

# Hydroponic approved 50lb bulk bag 3-5mm crystal size Copper Sulfate Small Crystals 50lb Bag

**Brand:** copper sulfate crystals
**Price:** € 981.86
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Copper Sulfate Small Crystals 50lb Bag by copper sulfate crystals
- **How much does it cost?** € 981.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/50920395-copper-sulfate-small-crystals-50lb-bag)

## Best For

- copper sulfate crystals enthusiasts

## Why This Product

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

## Key Features

- • **Bulk Supply:** 50lb bag designed for extensive home & garden use
- • **Algae Control Power:** Proven to eliminate stubborn pond algae effectively
- • **Hydroponic Friendly:** Safe and approved for hydroponic applications
- • **Precision Crystal Size:** 3-5mm granules for easy, even distribution
- • **User-Friendly Application:** Small crystals toss easily by hand for hassle-free use

## Overview

Copper Sulfate Small Crystals come in a 50lb bulk bag featuring 3-5mm granules ideal for home and garden algae control. Hydroponic approved and easy to apply by hand, this product offers a proven, cost-effective solution to manage persistent algae blooms in ponds and water features without harming fish.

## Description

Some of our customers have asked for a larger crystal size than our standard mini-crystals and this is the product! Looks like small gravel or 3-5 MM. We have a briquette sized copper sulfate called copper sulfate large, if this size is too small for you. Not registered as a pesticide.

Review: Good to control the algae! - Been battling filamentous algae and Chara in my 1/2 acre pond for a few years now. Nothing that the pond expert websites sell would touch it, yet alone control it. Decided to try the copper sulfate crystals and I'm amazed. Had zero floating algae blooms this year. Chara still made an attempt to grow, but after a few applications of this, I think it's under control. I have one specific shoreline where it grows out of control. Chara would turn brown and start floating to the surface. Between this product, pond bacteria, and pond dye, I think I'll be able to manage the pond with less money and a lot less of my time raking out algae! I distributed the copper sulfate by hand. Wearing gloves and mask, I could take a small handful and throw it out like skipping a rock. Works good and evenly distributes it. Tried the hand crank spreader, but it just has issues with jagged edges of the small crystals. Wasn't sure of exactly how much to apply. Did one shoreline at a time with a week in between. Bought two, 50# bags and have about 25# left. No fish have died from it, so i think I'm good.
Review: excellant product. have used it for seveal yrs. ... - excellant product. have used it for seveal yrs. appox 20 lb on a 1/2 acre pond and killed all on the alge.. small size is easier to apply. just toss out from edges of pond..

## Features

- Perfect For Home and Garden Use
- Bulk
- Hydroponic Approved
- 3-5MM

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01C5270D0 |
| Brand | Copper Sulfate Crystals |
| Brand Name | Copper Sulfate Crystals |
| Container Type | Bag |
| Customer Reviews | 4.4 out of 5 stars 65 Reviews |
| Item Form | Granule |
| Item Weight | 50 pounds |
| Manufacturer | Quimag and Old Bridge |
| Package Information | Bag |
| UPC | 661799896979 |

## Product Details

- **Brand:** Copper Sulfate Crystals
- **Item Weight:** 50 Pounds
- **Package Information:** Bag
- **Item Form:** Granule
- **Manufacturer:** Quimag and Old Bridge

## Images

![Copper Sulfate Small Crystals 50lb Bag - Image 1](https://m.media-amazon.com/images/I/41fz64v8U6L.jpg)
![Copper Sulfate Small Crystals 50lb Bag - Image 2](https://m.media-amazon.com/images/I/51Nc7eXIeVL.jpg)
![Copper Sulfate Small Crystals 50lb Bag - Image 3](https://m.media-amazon.com/images/I/41UraleqvpL.jpg)
![Copper Sulfate Small Crystals 50lb Bag - Image 4](https://m.media-amazon.com/images/I/91kE8B-yTbL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good to control the algae!
*by A***R on June 21, 2018*

Been battling filamentous algae and Chara in my 1/2 acre pond for a few years now. Nothing that the pond expert websites sell would touch it, yet alone control it. Decided to try the copper sulfate crystals and I'm amazed. Had zero floating algae blooms this year. Chara still made an attempt to grow, but after a few applications of this, I think it's under control. I have one specific shoreline where it grows out of control. Chara would turn brown and start floating to the surface. Between this product, pond bacteria, and pond dye, I think I'll be able to manage the pond with less money and a lot less of my time raking out algae! I distributed the copper sulfate by hand. Wearing gloves and mask, I could take a small handful and throw it out like skipping a rock. Works good and evenly distributes it. Tried the hand crank spreader, but it just has issues with jagged edges of the small crystals. Wasn't sure of exactly how much to apply. Did one shoreline at a time with a week in between. Bought two, 50# bags and have about 25# left. No fish have died from it, so i think I'm good.

### ⭐⭐⭐⭐⭐ excellant product. have used it for seveal yrs. ...
*by D***N on July 2, 2018*

excellant product. have used it for seveal yrs. appox 20 lb on a 1/2 acre pond and killed all on the alge.. small size is easier to apply. just toss out from edges of pond..

### ⭐⭐⭐⭐⭐ Prevents growth of tree roots.
*by B***6 on March 12, 2025*

I use copper sulfate to keep the tree roots from growing through my sewer pipes, and I've had great success.

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-10-09*