--- product_id: 636390950 title: "Crystal Blue Plex Lake and Pond Algae Control" brand: "crystal blue" price: "₹ 4302" currency: INR in_stock: true reviews_count: 5 category: "Crystal Blue" url: https://www.desertcart.in/products/636390950-crystal-blue-plex-lake-and-pond-algae-control store_origin: IN region: India --- # Up to 30 days active control 1 gallon treats 1 acre pond Liquid copper sulfate formula Crystal Blue Plex Lake and Pond Algae Control **Brand:** crystal blue **Price:** ₹ 4302 **Availability:** ✅ In Stock ## Summary > 💦 Clear waters, zero algae—own your pond’s glow-up! ## Quick Answers - **What is this?** Crystal Blue Plex Lake and Pond Algae Control by crystal blue - **How much does it cost?** ₹ 4302 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/636390950-crystal-blue-plex-lake-and-pond-algae-control) ## 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 - • **Easy Application:** Best applied with broadcast spray; treat in sections to maintain oxygen balance. - • **Fish-Safe Formula:** Safe for most fish species—just avoid Koi, Goldfish, and Trout ponds. - • **Efficient Coverage:** One gallon treats a full acre pond, 1 to 3 feet deep—max impact, minimal effort. - • **Long-Lasting Action:** Keeps your pond pristine for up to 30 days with a single application. - • **Powerful Algae Eliminator:** Targets and eradicates multiple algae types for crystal-clear water. ## Overview Crystal Blue Plex Lake and Pond Algae Control is a liquid copper sulfate solution designed to eliminate various algae types effectively. It remains active for up to 30 days, with one gallon treating a 1-acre pond between 1 and 3 feet deep. Safe for most fish species except Koi, Goldfish, and Trout, it requires careful application to avoid oxygen depletion, making it the go-to choice for maintaining vibrant, algae-free ponds. ## Description A liquid copper sulfate used to control many forms of algae and stays active for up to 30 days. No irrigation or consumption restrictions and is safe for most fish. Best results when applied with broadcast spray. Only treat a portion of the pond at a time to prevent oxygen depletion. 1 gallon treats a 1 acre pond 1' to 3' deep. Do not use in Koi, Goldfish, or Trout ponds. Review: Tough on Planktonic Algae Review: West gloves and don't use if the wind is blowing. ## Features - Eliminates algae from ponds - Liquid copper sulfate - Stays active for up to 30 days - 1 gallon treats 1 acre pond 1-foot to 3-feet deep - Do not use in Koi, Goldfish or Trout ponds ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000IOBRBY | | Brand | Crystal Blue | | Brand Name | Crystal Blue | | Customer Reviews | 4.0 out of 5 stars 856 Reviews | | Global Trade Identification Number | 00768980004448 | | Item Form | Copper,Liquid | | Item Weight | 4.08 kg | | Item form | Copper,Liquid | | Item height | 12 inches | | Item weight | 4.08 kg | | Liquid Volume | 128 Fluid Ounces | | Liquid volume | 128 Fluid Ounces | | Manufacturer | Sanco | | Target Species | Fish | | UPC | 768980004448 | ## Product Details - **Brand:** Crystal Blue - **Liquid volume:** 128 Fluid Ounces - **Item weight:** 9 Pounds - **Item form:** Copper,Liquid - **Manufacturer:** Sanco ## Images ![Crystal Blue Plex Lake and Pond Algae Control - Image 1](https://m.media-amazon.com/images/I/619qMcbGtKL.jpg) ![Crystal Blue Plex Lake and Pond Algae Control - Image 2](https://m.media-amazon.com/images/I/718k4O+LBeL.jpg) ![Crystal Blue Plex Lake and Pond Algae Control - Image 3](https://m.media-amazon.com/images/I/81ba4QW2HQL.jpg) ![Crystal Blue Plex Lake and Pond Algae Control - Image 4](https://m.media-amazon.com/images/I/912218GBjxL.jpg) ![Crystal Blue Plex Lake and Pond Algae Control - Image 5](https://m.media-amazon.com/images/I/918ocx9SvdL.jpg) ## Questions & Answers **Q: Is Crystal Plex 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, Crystal Plex is not meant for small deco ponds and is toxic to Koi, Goldfish and Trout. **Q: How often should I use Crystal Plex?** A: Crystal Plex 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 mixing and spraying algae. **Q: How much product do I use?** A: 13 oz. of Crystal Plex mixed with a couple gallons of water will treat 1,000 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 ### ⭐⭐⭐⭐⭐ Tough on Planktonic Algae *by G***5 on 18 August 2025* ### ⭐⭐⭐⭐⭐ West gloves and don't use if the wind is blowing. *by P***N on 21 October 2025* ### ⭐⭐⭐⭐ Summertime fun on Bickford pond. *by S***K on 6 August 2025* ## Frequently Bought Together - Crystal Plex - Lake and Pond Algaecide Treatment - Liquid Copper Algaecide Kills and Prevents Various Types of Algae (Planktonic, Filamentous, Chara) - 1 Gallon Treats up to 1 Acre - Crystal Blue Natural Pond Cleaner - Muck and Sludge Remover, Safe for Koi - 1 Gallon - Crystal Blue Lake and Pond Dye - 1 Gallon - Royal Blue Color Treats up to 1 Acre - Clean, Clear & Crystal Blue Water - Environmentally Friendly Pond Dye --- ## 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.in/products/636390950-crystal-blue-plex-lake-and-pond-algae-control](https://www.desertcart.in/products/636390950-crystal-blue-plex-lake-and-pond-algae-control) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-05-04*