--- product_id: 259309832 title: "Kordon #37344 Methylene Blue-General Disease Prevention Tre" brand: "kordon" price: "€ 21.28" currency: EUR in_stock: true reviews_count: 5 category: "Kordon" url: https://www.desertcart.pt/products/259309832-kordon-37344-methylene-blue-general-disease-prevention-tre store_origin: PT region: Portugal --- # 4 oz liquid precision dosing Fights fungus & protozoan parasites Proudly made in USA Kordon #37344 Methylene Blue-General Disease Prevention Tre **Brand:** kordon **Price:** € 21.28 **Availability:** ✅ In Stock ## Summary > 💙 Keep your aquatic ecosystem thriving with precision and care! ## Quick Answers - **What is this?** Kordon #37344 Methylene Blue-General Disease Prevention Tre by kordon - **How much does it cost?** € 21.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/259309832-kordon-37344-methylene-blue-general-disease-prevention-tre) ## Best For - kordon enthusiasts ## Why This Product - Trusted kordon brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Odor-Free & Easy to Use:** Clear blue liquid with no unpleasant smell, ensuring a hassle-free treatment experience. - • **Oxygen Transport Booster:** Supports fish recovery from cyanide and nitrite poisoning by enhancing oxygen transport. - • **Ultra-Concentrated Formula:** Less than one drop treats 50 liters—maximize your aquarium’s health with minimal effort. - • **Trusted Quality & Longevity:** Made in the USA with a 4.7-star rating from over 3,500 users—join thousands of satisfied aquarium pros. - • **Multi-Purpose Disease Defense:** Effectively controls fungal infections on eggs and combats external protozoan parasites for all fish breeds. ## Overview Kordon #37344 Methylene Blue is a 4-ounce, odor-free liquid treatment designed for aquarium and pond water disease prevention. It effectively controls fungal infections on fish eggs and external protozoan parasites, while aiding oxygen transport in fish affected by toxins. Made in the USA and highly rated by thousands, it offers a concentrated, easy-to-use solution trusted by professional breeders and hobbyists alike. ## Description KORDON #37344 Methylene Blue-General Disease Prevention Treatment for Aquarium, 4-Ounce, Review: Muy bueno, con menos de una gota de cubren 50 litros Review: I have used this product to breed discus fish and it was very useful. I would recommend this item for sure ## Features - manufacturer: Kordon - Item Trademark: KORDON - Item Weight: ounces, pounds, 0.5000, 8. - Item Category: Aquarium Pond Water Treatment ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00025646W | | Allergen Information | Odor-Free | | Batteries Included | No | | Best Sellers Rank | #22,272 in Pet Supplies ( See Top 100 in Pet Supplies ) #179 in Fish Medication & Health Supplies | | Breed Recommendation | All Breed Sizes | | Care instructions | Store in a cool, dry place. Do not freeze. | | Closure | CAP | | Color | CLEAR BLUE | | Customer Reviews | 4.7 4.7 out of 5 stars (3,555) | | Date First Available | 21 August 2012 | | Flavor | Other | | Item Form | Liquid | | Item Weight | 9.07 g | | Item model number | MODEL-37344 | | Number of Items | 1 | | Pet Life Stage | all ages | | Product Dimensions | 5.08 x 5.08 x 12.7 cm; 9.07 g | | Quantity | 1 | | Size | 4 Ounce | | Special Features | MADE IN USA | | Specific Uses | The use of Methylene Blue is primarily for the control of fungus on eggs, and to assist the transport of oxygen in fish poisoned by cyanide and nitrite ion. Secondary uses are for the control of some external protozoan parasites of fishes. Methylene Blue is an alternative for treatment with other medications when prevailing factors preclude the use of another medication. | | Storage Information | STORE IN COOL DRY PLACE. NO SUN EXPOSURE | | batteries required | No | ## Product Details - **Brand:** Kordon - **Item form:** Liquid - **Item weight:** 9 g - **Liquid volume:** 4 Fluid Ounces - **Manufacturer:** Kordon ## Images ![Kordon #37344 Methylene Blue-General Disease Prevention Tre - Image 1](https://m.media-amazon.com/images/I/61Ueqt3BcYL.jpg) ## Available Options This product comes in different **Pattern, Size** options. ## Questions & Answers **Q: Has anyone used this for fin rot and does it work well?** A: Use a few drops of this with a tsp of Epson salt per gallon and your fishy will heal. The methylene blue will stick to wound to provide oxygen to promote healing. Change 1/3 of the water per week. **Q: Is this solution good for microscope labs?** A: heck yeah! **Q: Can someone tell me if there are any additional ingredients ( preservatives,food colorings,additives,etc.) in this product?** A: label does not list any addl ingredients. Does state for aquarium fish use only. Not for human or food fish use. **Q: How much do you use per gal?** A: Please aquarium use, please follow the directions on the bottle, which says 1 tsp in 10 gallons produces a 3ppm solution. For 1 gallon, one tenth of a teaspoon is 0.5 mL, or about 10 drops. For other uses, please be aware that this is not a 1% solution. The manufacturer states that this is a 2.303% solution. This means that each drop contains 1.15mg (not 0.5mg). ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***A on 4 December 2019* Muy bueno, con menos de una gota de cubren 50 litros ### ⭐⭐⭐⭐⭐ Review *by C***D on 17 November 2016* I have used this product to breed discus fish and it was very useful. I would recommend this item for sure ### ⭐⭐⭐⭐⭐ Review *by S***0 on 1 November 2025* Works well great stuff ## Frequently Bought Together - Kordon Methylene Blue Disease Preventative – Safe for Freshwater & Saltwater Aquariums, Prevents Fungal Infections & Treats Parasites, Reduces Fish Stress, 4-Ounces - Kanaplex, 5 g(0.18 oz) - API AQUARIUM SALT Freshwater Aquarium Salt 36-Ounce Box --- ## 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.pt/products/259309832-kordon-37344-methylene-blue-general-disease-prevention-tre](https://www.desertcart.pt/products/259309832-kordon-37344-methylene-blue-general-disease-prevention-tre) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-04-22*