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Kordon

Kordon Methylene Blue Disease Preventative – Safe for Freshwater & Saltwater Aquariums, Prevents Fungal Infections & Treats Parasites, Reduces Fish Stress, 4-Ounces

    • Based on 3,010 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, May 6
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Features

  • Kordon methylene blue 4oz
  • 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

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.


Brand: Kordon


Liquid Volume: 4 Fluid Ounces


Item Weight: 4 Ounces


Item Form: Liquid


Target Species: Fish


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 2 x 2 x 5 inches; 4 Ounces


Item model number ‏ : ‎ MODEL-37344


Date First Available ‏ : ‎ October 2, 2001


Manufacturer ‏ : ‎ KORDON LLC


Country of Origin ‏ : ‎ USA


Domestic Shipping: Item can be shipped within U.S. International Shipping This item is not eligible for international shipping. Learn More


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, May 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Fungus, not sure what's going on. Fish need extra oxygen.
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
Review Image by Tina Wilson Tina Wilson
I've been using methylene blue for a long time. I use it for fungus on my fish if I notice a little bit starting or if their coat starts getting a little slimy. I usually try this before I try anything else. Or if for some reason my nitrates or nitrite spike I'll use this a little bit for some added oxygen if my fish start getting stressed out or are already stressed out. This has always worked very well for me. I've never had any fish stressed out about it. No headshaking ever like what happens when I add metronidazole or praziquantal or other meds. Methylene blue has also never hurt my pond plants. I don't pour it directly in my pond. It's always been in the hospital tank. I did recently use it when I bought some water hyacinth from a pond shop. I always bring them home and put them in a container with grow lights and heat to make sure that they don't have a bunch of snails and dragonfly nymphs and whatever else there is on those things. Well, I ended up having a bunch of baby fry fish hatch from these plants. About a week later the little fry baby's started turning white and dying. I wasn't really sure what to due because I didn't want to kill these plants that I just spent a couple hundred dollars for and I didn't want to let the baby fish die. I added some methylene blue and some nitrofuranzone together with the baby fry and with the plants which also had snails, snail eggs, dragonfly nymphs on them and the white that I guess was fungus on these little baby fish I can't really tell because they were so small. I did it once left it in there for two days and then the partial water change and I didn't have any more baby fry fish die and my Hyacinth plants are still growing and still blooming. Some even flowered out purple flowers right away. So it didn't hurt them at all. I was kind of disappointed about these plants and there had to have been something on them for these baby fish to get this but not only that the guy told me that they had goldfish in with the plants. I called And asked him after all these baby fries start hatching. I think something that people should think about, and I don't know if people actually just buy plants and throw them in their ponds. I always did and I always ended up coming down with some kind of ailment around that time and I just thought it was a change in temperature, water parameters. But if the place where you buy the plants has goldfish or other fish in with them they have a fungus or bacterial infection and you bring those plants home and throw them in your pond you're going to bring that stuff into your pond. So for now on I quarantine my plants. Back to the methylene blue. It's definitely blue. I've never had it stain anything. I took pictures of what it looked like. It took pictures of my fingers after completely just dipping them in the stuff. And then the last picture I took was me washing my hands one time. It was almost completely off. Once I take a shower it's completely gone. I've never had the methylene blue stain anything that I've ever had permanently. I think that having the methylene blue around in case you have something going on and you don't know what it is is a fish lifesaver. You can at least be able to use it just in case you need to. It is better than not having anything at all. If I wouldn't have had the methylene blue on hand along with the nitrfurazone at the time I'm pretty sure all the little fish would have been dead. Because that morning when I checked on them they had nothing white on them. Later that afternoon is when I started noticing it. About four of them died. So that's my methylene blue story. I'm not sure how it would stain if you got it like on your rings or your jewelry or anything but it does eventually go away when I get it on my hands and stuff. ... show more
Reviewed in the United States on May 21, 2020 by Tina Wilson Tina Wilson
    • A must have for everyone who that owns a aquarium
Great for treating many common issues with fish, I highly recommend this and aquarium salt but be careful when using this stuff will kill the beneficial bacteria in your tank I put this in a separate hospital tank treat the fish and then put the fish back into the main tank , aquarium salt won't kill the beneficial bacteria but it is harmful to scaleless fish like pleco's so I separate them when using it together they will help cure or at least treat most common issues search YouTube and Google on how to use them lots of info out there .... No one being a responsible fish owner was easy ... show more
Reviewed in the United States on July 6, 2023 by Joe A
    • CLEAN MY ACT UP
THE JOB GOT DONE AAA+++
Reviewed in the United States on July 20, 2023 by JERRY GONZALEZ
    • Works brilliantly
Review Image by Finch Finch
Review Image by Finch Finch
Review Image by Finch Finch
After reading some of the other reviews, I noticed some common mistakes so I thought I’d write my own and give y’all some tips!! -Methylene blue is for medicinal use ONLY -not comparable with CARBON MEDIA or ACTIVATED CARBON FILTERS -will kill plants!! -use in small doses! Do 50% water changes frequently!! -ALWAYS treat newly purchased fish with methylene blue during their quarantine before being added to your main tank! Methylene blue is excellent for shipping fish, keeping your fish calm, or fighting off disease/infections/parasites with a hospital tank. In my pictures you see my fish being treated with a half dose. The first picture shows my platies being treated during quarantine, the second is my school being treated during a tank deep clean, and the third is just a nice photo of my tank. TLDR: excellent in moderation, read instructions carefully, always do your own research as well ... show more
Reviewed in the United States on April 7, 2023 by Finch Finch
    • Used for my axolotl tank
Review Image by Roxanne Romero Roxanne Romero
Love this helps prevent and treat fungus. I have 2 axolotls and want to keep them healthy. This is a must have for out axles.
Reviewed in the United States on July 2, 2023 by Roxanne Romero Roxanne Romero
    • Be careful it stains
I wouldn't recommend putting it directly in your tank, I have a separate tank for my fish when they need treatment, but it does stain different plastics. But that is really a small issue compared to how well it works on treating your fish. 100% worth having a bottle in case of emergencies.
Reviewed in the United States on June 14, 2023 by Louie Hernandez
    • Need more concentration to save your eggs
5-6 drops in a breeder box nothing less than that or else your eggs won’t survive from fungus! Same for treating other infections as well.
Reviewed in the United States on May 24, 2023 by Vinnyvinny
    • Great product
I’ve treated my fish that had itch also my axolotl for fungus infections. It’s a good product. I will keep it on hand.
Reviewed in the United States on June 23, 2023 by Chula

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