---
product_id: 34180077
title: "Copper Sulfate Large Crystals 10lb Bag"
brand: "xnets"
price: "$298"
currency: NZD
in_stock: true
reviews_count: 8
url: https://www.desertcart.nz/products/34180077-copper-sulfate-large-crystals-10lb-bag
store_origin: NZ
region: New Zealand
---

# Hydroponic Approved Briquette Size USA Made Copper Sulfate Large Crystals 10lb Bag

**Brand:** xnets
**Price:** $298
**Availability:** ✅ In Stock

## Summary

> 🌟 Transform Your Garden with Copper Magic!

## Quick Answers

- **What is this?** Copper Sulfate Large Crystals 10lb Bag by xnets
- **How much does it cost?** $298 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/34180077-copper-sulfate-large-crystals-10lb-bag)

## Best For

- xnets enthusiasts

## Why This Product

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

## Key Features

- • **Bulk Brilliance:** 10lb bag ensures you have enough for all your gardening needs.
- • **Crystal Clarity:** 5+ MM crystals for optimal solubility and effectiveness.
- • **Made in the USA:** Support local manufacturing while enhancing your gardening game.
- • **Versatile Applications:** Perfect for hydroponics, agriculture, and more!
- • **Elevate Your Hydroponics:** Unlock the potential of your plants with premium-grade copper sulfate.

## Overview

Our Copper Sulfate Large Crystals come in a convenient 10lb bag, featuring briquette-sized crystals that are hydroponic approved and proudly made in the USA. With 5+ MM crystals, this product is designed for maximum solubility and effectiveness in various applications.

## Description

Copper Sulfate Large Crystals 10lb Bag

## Features

- Briquette Size
- Bulk
- Hydroponic Approved
- USA Made
- 5+ MM Crystals

## Product Details

- **Brand:** Xnets
- **Item Weight:** 10 Pounds
- **Item Form:** Granule
- **Manufacturer:** Earthworks Health LLC
- **UPC:** 756519496970

## Images

![Copper Sulfate Large Crystals 10lb Bag - Image 1](https://m.media-amazon.com/images/I/41QQqqlpyzL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works, but be careful because technically it's toxic
*by T***T on December 2, 2024*

I have a water fountain/feature of about 100 gallons that was plagued with algae. I used a three-pronged approach to tackle it. 1) I put a small handful of these crystals in the fountain. 2) I scrubbed the algae off the large rocks using a brass brush. 2) I put a small barley straw bale into the fountain. After about a week, all of the algae was gone. I'm hoping that the barley straw will keep it away from now on.My only concern is that copper sulfate is technically toxic. Fortunately, during the winter there aren't that many wild animals about, and they don't drink much from the fountain anyway. I do wonder whether the copper sulfate just circulates over and over through the fountain, since it doesn't evaporate and I don't think it gets absorbed by the rocks. So maybe the lever of copper sulfate will stay the same forever in the fountain.Anyway, I now have 9.9 pounds of copper sulfate left, and I hope I will never need to use any more.

### ⭐⭐⭐⭐⭐ These are big crystals as advertised
*by B***. on June 28, 2024*

I am using these to control tree roots in my sewer system. They seem to be effective.

### ⭐⭐⭐⭐⭐ EXCELLENT ROOT KILLER!!
*by R***9 on August 26, 2024*

Living in an older (1954) home comes with its perks and disadvantages. One disadvantage is long established trees and their root systems. Some trees and bushes will seek out any water source they can find; including sewer lines. After one instance of a several hundred $$$ for a plumber to clear roots out of the sewer line, I did research and found copper sulfate. Using about two cups of the large or extra large crystals in the main line once a month, I have never called the plumber again. . .20 years now.There are a couple of instances where roots have started to come up in the yard; growing new trees, UGH! Just dug out around the area enough to pour dissolved copper sulfate (1/2 cup copper sulfate in four cups water. . .takes a couple of days to fully dissolve), around the exposed root and POOF, a few days will render it dead. . .never to be seen again, WooHoo!

## Frequently Bought Together

- Copper Sulfate Large Crystals 10lb Bag
- Copper Sulfate Crystals-10lb Bag (FINE Crystals)
- Copper Sulfate Small Crystals 10lb Bag

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-17*