---
product_id: 259309832
title: "Kordon #37344 Methylene Blue-General Disease Prevention Tre"
brand: "kordon"
price: "€ 40.78"
currency: EUR
in_stock: true
reviews_count: 5
category: "Kordon"
url: https://www.desertcart.es/products/259309832-kordon-37344-methylene-blue-general-disease-prevention-tre
store_origin: ES
region: Spain
---

# 4 oz liquid formula Fights fungal & protozoan infections Made in USA quality Kordon #37344 Methylene Blue-General Disease Prevention Tre

**Brand:** kordon
**Price:** € 40.78
**Availability:** ✅ In Stock

## Summary

> 💙 Keep your aquarium thriving with the ultimate fungal & parasite shield!

## Quick Answers

- **What is this?** Kordon #37344 Methylene Blue-General Disease Prevention Tre by kordon
- **How much does it cost?** € 40.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/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

- • **Dual-Action Defense:** Combats both fungal infections and external protozoan parasites like ich and costia.
- • **Odor-Free & Easy Storage:** Clear blue liquid with no unpleasant smell, stores safely in a cool, dry place.
- • **Safe for All Life Stages:** Gentle enough for fish eggs and fry, protecting your aquatic ecosystem from day one.
- • **Trusted Quality Assurance:** Proudly made in the USA with a 4.7-star rating from over 3,500 users.
- • **Precision Treatment, Maximum Coverage:** Just a drop treats up to 50 liters of water, ensuring efficient and economical use.

## Overview

Kordon #37344 Methylene Blue is a 4-ounce liquid treatment designed to prevent and control fungal infections and external protozoan parasites in aquarium fish. Safe for all life stages including eggs and fry, it offers a reliable alternative to harsher chemicals. Made in the USA and highly rated by thousands, this odor-free formula treats up to 50 liters per drop, making it an efficient and essential addition to any serious aquarist’s toolkit.

## Description

Methylene blue is effective against superficial fungal infections of fishes. The drug may be used as an alternative to malachite green for the control of fungus when it is known that the fish to be treated are sensitive. Methylene blue is safe for use with fish eggs and fry for the prevention of fungal infections. As a secondary use, it is effective against some external protozoans, such as ich, chilodonella and costia.

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 | #19,215 in Pet Supplies ( See Top 100 in Pet Supplies ) #144 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 (3,547) |
| 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 Life Stages |
| 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)

## 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

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-04*