--- product_id: 53170370 title: "NT Labs Koi Care Malachite Treatment (500ml Treats 2 x 20,000L)" brand: "nt labs" price: "€ 47.92" currency: EUR in_stock: true category: "Nt Labs" url: https://www.desertcart.hr/products/53170370-nt-labs-koi-care-malachite-treatment-500ml-treats-2-x store_origin: HR region: Croatia --- # 7-day effective treatment cycle 500ml potent liquid formula 1.0% Malachite Green active ingredient NT Labs Koi Care Malachite Treatment (500ml Treats 2 x 20,000L) **Brand:** nt labs **Price:** € 47.92 **Availability:** βœ… In Stock ## Summary > 🐟 Keep your koi flawless with NT Labs β€” the pro’s choice for crystal-clear ponds! ## Quick Answers - **What is this?** NT Labs Koi Care Malachite Treatment (500ml Treats 2 x 20,000L) by nt labs - **How much does it cost?** € 47.92 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/53170370-nt-labs-koi-care-malachite-treatment-500ml-treats-2-x) ## Best For - nt labs enthusiasts ## Why This Product - Trusted nt labs brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Simple 7-Day Protocol:** Just one week of treatment with clear instructions ensures your koi bounce back healthier and fungus-free. - β€’ **Safe & Targeted Treatment:** Formulated specifically for koi; avoid use with orfe, rudd, tench, or sturgeon for optimal safety. - β€’ **Powerful Anti-Fungal Defense:** Clinically proven 1.0% Malachite Green to eliminate stubborn fungal infections on koi. - β€’ **Precision Dosage for Any Pond:** Easily calculate and apply the perfect dose based on your pond’s volume for maximum effectiveness. - β€’ **Trusted by Experts for 40 Years:** Join thousands of koi enthusiasts who rely on NT Labs’ industry-leading koi care range. ## Overview NT Labs Koi Care Malachite is a 500ml liquid anti-fungal treatment containing 1.0% Malachite Green, designed to effectively treat fungal infections caused by Saprolegnia on koi fish. Trusted for over 40 years, this easy-to-use formula requires a 7-day treatment cycle and precise dosing based on pond volume, ensuring safe and targeted care for your prized koi. ## Description Free delivery and returns on eligible orders. Buy NT Labs Koi Care Malachite Treatment (500ml Treats 2 x 20,000L) | Liquid formula targets white growths with green or brown discolouration appearing on the fish body and fins. at desertcart UK. ## Features - 【 ANTI-FUNGAL TREATMENT FOR KOI 】: Use when fish show signs of Fungal Infections including white growths on the body, head or fins, which may contain some green or brown discolouration. - 【 EASY TO USE 】: To work out the required dosage for your pond, calculate the volume of your pond in litres (length x width x depth (in cm)/1000). Mix the appropriate dosage in a clean bucket of pond water, pour evenly over the surface of the pond and leave for 7 days. Switch off UV filtration until treatment has been completed. Aerate the pond well during treatment. If you feel a repeat dose is necessary, check your diagnosis carefully using the Diagnosis Tool; a different medication may be more suitable. Allow 7 days and perform a partial water change before re-treating or treating with a different medication. - 【 TREATMENT RULES】: Do not use with orfe, rudd, tench or sturgeon/sterlet. Do not use if the water temperature is above 30Β°C. Do not use in hot, humid, thundery conditions. Do not mix medications. - 【 EFFECTIVE ACTIVE INGREDIENT 】: Koi Care Malachite contains Malachite Green (1.0% w/v). This ingredient makes it a powerful solution to treat fungal infections on koi. - 【 THE LEADING RANGE OF KOI CARE PRODUCTS 】: The most highly regarded range of koi products in the industry, trusted for 40 years by both trade customers and consumers alike, this range effectively cares for and protects koi in the environment in which they live. From products that treat parasitic or bacterial infections to a tap water dechlorinator, the NT Labs Koi Care range offers koi enthusiasts everything they could possibly need to keep perfect koi and an equally perfect koi pond. - [ MADE IN BRITAIN ] : Proudly formulated and manufactured in the UK to strict quality, environmental and safety standards, delivering exceptional product reliability you can trust. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003ZGE6TC | | Best Sellers Rank | 57,493 in Pet Supplies ( See Top 100 in Pet Supplies ) 269 in Water Garden & Pond Treatment 777 in Aquarium Water Quality Testing & Treatment | | Brand Name | NT Labs | | Customer Reviews | 4.6 4.6 out of 5 stars (119) | | Included Components | NT Labs Malachite | | Item Form | Liquid | | Item Highlight | Liquid formula targets white growths with green or brown discolouration appearing on the fish body and fins. | | Item Type Name | Koi Care Malachite | | Liquid Volume | 500 Millilitres | | Manufacturer | NT Labs | | Manufacturer Part Number | Aqua 399 | | Model Number | NT Labs | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Fish | | Target Species | Fish | | UPC | 733809002325 | | Unit Count | 500.0 millilitre | ## Product Details - **Brand:** NT Labs - **Item form:** Liquid - **Liquid volume:** 500 Millilitres - **Number of Packs:** 1 - **Unit count:** 500.0 millilitre ## Images ![NT Labs Koi Care Malachite Treatment (500ml Treats 2 x 20,000L) - Image 1](https://m.media-amazon.com/images/I/61456quAIvL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - NT Labs Koi Care Malachite, Koi Medicine, Malachite Green, Anti-Fungal Treatment for Koi, Treats Fungus Caused by Saprolegnia, 500ml - NT Labs Koi Care Acriflavin, Koi Medicine, Koi Treatment for Fin, Tail & Mouth Rot and Ulcers, Treats Bacterial Infections in Koi, Quarantine Solution for Koi, size - 500ml --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/53170370-nt-labs-koi-care-malachite-treatment-500ml-treats-2-x](https://www.desertcart.hr/products/53170370-nt-labs-koi-care-malachite-treatment-500ml-treats-2-x) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-11-11*