Has anyone used this for fin rot and does it work well?

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.

Can someone tell me if there are any additional ingredients ( preservatives,food colorings,additives,etc.) in this product?

label does not list any addl ingredients. Does state for aquarium fish use only. Not for human or food fish use.

How much do you use per gal?

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).

Kordon 37344 Methylene Blue General Disease Prevention Tre

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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₨518

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Keep your fish thriving—because your aquarium deserves the best defense!

ODOR FREE SAFE - Keep your aquatic environment fresh and stress-free for your fish with a clean, odorless treatment.
COMPACT EFFICIENT - 4 fluid ounces of powerful liquid treatment fits perfectly in your maintenance kit without clutter.
TRUSTED BY THOUSANDS - Join 3,600+ satisfied users who rate it 4.7 stars for reliable fish disease prevention.
PROVEN BRAND EXCELLENCE - Kordon’s legacy in aquarium care ensures your fish get premium protection every time.
ULTRA CONCENTRATED FORMULA - Just a drop treats over 50 liters—maximize your aquarium’s health with minimal effort.

Kordon #37344 Methylene Blue is a 4-ounce liquid aquarium treatment designed for general disease prevention. Highly concentrated, it treats over 50 liters per drop, is odor-free, and trusted by thousands of fish enthusiasts for maintaining healthy aquatic environments.

Specifications

ASIN	B00025646W
Allergen Information	Odor-Free
Best Sellers Rank	#19,174 in Pet Supplies ( See Top 100 in Pet Supplies ) #147 in Fish Medication & Health Supplies
Brand	Kordon
Brand Name	Kordon
Customer Reviews	4.7 out of 5 stars 3,648 Reviews
Global Trade Identification Number	00048054373442
Included Components	KORDON #37344 Methylene Blue-General Disease Prevention Treatment for Aquarium, 4-Ounce,
Item Form	Liquid
Item Type Name	KORDON # 37344 METHYLENE BLUE 4 OZ
Item Weight	4 Ounces
Item form	Liquid
Item weight	4 Ounces
Liquid Volume	4 Fluid Ounces
Liquid volume	4 Fluid Ounces
Manufacturer	Kordon
Manufacturer Part Number	048054373442
Model Number	MODEL-37344
Pet Type	Fish
Target Species	Fish
UPC	048054373442
Unit Count	4 Milliliters
Unit count	4 Milliliters

Reviews

K**E

Stupid bottlecap design

stupid bottle cap design and now, it is fused together and i cant open it. This is after not using it for awhile I dont understand why they do something so stupid. Just use a normal cap for gods sakes

17.04.2026

D**A

Rinde mucho y es muy bueno

Muy bueno, con menos de una gota de cubren 50 litros

4.12.2019

C**D

thanks it was very usefull

I have used this product to breed discus fish and it was very useful. I would recommend this item for sure

17.11.2016

S**0

Good product

Works well great stuff

1.11.2025

A**O

Prodotto giunto come stabilito. Rispettosi della richiesta

Devo complimentarmi con il sito. Prodotto che ha soddisfatto le mie aspettative.

31.12.2023

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₨518

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Seychelles.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago