--- product_id: 716496065 title: "Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds" brand: "crystal blue" price: "699.70 DT" currency: TND in_stock: true category: "Crystal Blue" url: https://www.desertcart.tn/products/716496065-crystal-blue-copper-sulfate-algaecide-granular-aquatic-grade-copper-sulfate store_origin: TN region: Tunisia --- # Versatile application: broadcast, bag drag, or spray 99% pure Copper Sulfate Pentahydrate Effective above 60°F water temp Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds **Brand:** crystal blue **Price:** 699.70 DT **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?** 699.70 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/716496065-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 - • **Precision Algae Control:** Targets filamentous & string algae with surgical accuracy - • **Fish-Safe When Used Right:** Protects most fish species—just avoid koi, goldfish, trout & grass carp - • **Optimized for Large Ponds:** Designed for expansive water bodies, not small decorative ponds - • **Oxygen-Conscious Treatment:** Treat half the algae at a time to maintain healthy oxygen levels for aquatic life - • **Flexible Application Methods:** Broadcast, burlap bag drag, or dissolve & spray for maximum convenience ## Overview Crystal Blue Copper Sulfate is a granular, aquatic-grade algaecide with 99% pure copper sulfate pentahydrate, engineered for effective control of filamentous and string algae in large ponds. Best applied in water temperatures above 60°F, it offers versatile application methods and is safe for most fish species when used responsibly. Ideal for professionals managing expansive water bodies seeking reliable, oxygen-conscious algae treatment. ## Description Crystal Blue Copper Sulfate is a great pond algae control product for filamentous or string algae. Copper sulfate should be used as a pond algae treatment on actively growing algae in water temperature above 60F. When getting rid of algae in a pond, it is always important to treat 1/2 of the pond algae at a time to avoid killing too much algae and depleting the water of oxygen. Copper sulfate is safe for most varieties of fish (see restrictions below) when used properly. Granular copper can be applied in one of three different ways: broadcast crystals, place crystals in a burlap bag and drag behind boat, or dissolve crystals and spray. The application method we recommend is to dissolve the crystals in hot water and spray actively growing algae. ## 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 | | Allergen Information | Abalone | | Brand Name | Crystal Blue | | Customer Reviews | 4.4 4.4 out of 5 stars (2,321) | | Global Trade Identification Number | 00768980003335 | | Included Components | Copper Sulfate | | Item Form | Granules | | Item Type Name | Algaecide | | Liquid Volume | 5 Liters | | Manufacturer | Sanco Industries | | Manufacturer Part Number | 333 | | Model Number | 333 | | Target Species | Fish | | UPC | 768980003335 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Crystal Blue - **Item form:** Granules - **Liquid volume:** 5 Liters - **Manufacturer:** Sanco Industries - **Unit count:** 1.0 Count ## 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. ## Frequently Bought Together - Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds - Blue Lake and Pond Dye - One Gallon of Professional Lake & Pond Dye - Treats Up to 1 Acre - Royal Blue Color - Safe for Fish, Wildlife, Pets & Children - Crystal Blue Natural Pond Cleaner - Muck and Sludge Remover, Safe for Koi - 1 Gallon --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/716496065-crystal-blue-copper-sulfate-algaecide-granular-aquatic-grade-copper-sulfate](https://www.desertcart.tn/products/716496065-crystal-blue-copper-sulfate-algaecide-granular-aquatic-grade-copper-sulfate) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-02*