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🌿 Heal your fish, protect your aquarium — naturally and fast!
API MELAFIX is a 16-ounce freshwater fish bacterial infection remedy that uses natural tea tree extract to heal wounds, fin rot, and ulcers within a week. Safe for aquarium ecosystems, it prevents disease outbreaks by treating new fish and maintaining water balance without affecting pH or beneficial bacteria. Trusted for over 50 years, it’s a must-have for any freshwater aquarium enthusiast aiming for vibrant, healthy fish.



















| Asin | B0002567T6 |
| Best Sellers Rank | #17 in Aquarium Water Treatments |
| Date First Available | June 20, 2004 |
| Item Model Number | 11J |
| Manufacturer | Mars Fishcare |
| Product Dimensions | 5 x 2 x 12 inches; 1 pounds |
User
Saved My Fish
I bought my granddaughter a fish, along with one for me. A few days later, her fish appeared to be peeling. Then two of my fish died and one was on its way out. My husband suggested an antibiotic (not this one) so I looked here and found this API MELAFIX one and ordered it. Her fish died before I got it. Then I had another fish getting sick so I put it in the quarantine tank with the other one. Next day I got this and started using it right away. My fish are back to being healthy and happy. I wish I would have found this sooner. It's a life saver, literally.
User
Highly recommend works like magic
This stuff is amazing, my fish was very sick and I gave him this as needed and he looks better than the day I got him I would highly recommend it I would also recommend a little mirror if your fishes fin is still having trouble growing back
User
Saved my fish!
I got a poor little Betta fish from a chain pet store (probably my first mistake) and I was so excited because he was tri-colored and had a beautiful teal look to him! And he was what I was looking for 'red/white/blue' I was so excited!Well he got put into his new tank, and he didn't seem to be moving around much, even for a betta which I have owned in the past. I started taking a closer look at him about a month after I got him, and he looked to have fin rot. He had been biting his tail in the tiny cup which is hard to see in the photos... So I got this neat stuff because it's less than half of betta fix, is the same active ingredient, and has a higher concentration. Win, win, win. Started using it in his tank on a regular, adding one drop per gallon with an eye dropper and doing regular water changes.And would you know it, he started changing colors! Now I'm not saying that this stuff will make your fish morph like it did mine, but it will save them if you use it as instructed for what it is meant to be used for. What I didn't know at the time of buying him is that he had a SEVERE bacterial infection all over his face and sides. That white I thought was part of his color WAS HIM BEING EATEN ALIVE BY THIS BACTERIA.This medication is designed to get rid of that bacteria, which is what causes fin rot as well. After using it for about 3 months on a regular I had a completely different fish, literally. He was so much happier and looked even more vibrant and had much more energy to inspect and even flair at my camera and show of his beautiful colors.Long story short, if you use this, USE IT FOR WHAT ITS MEANT TO BE USED FOR AND YOU'LL GET GREAT RESULTS. I know I did. I still have little ATO to this day (I've had him for about two years now) and he now has an entourage of shrimp palls to keep him company.In the picture provided you can still see some of the bacteria on his face around his eyes, that's long gone at this point but I couldn't get a good picture for him from today. Little bugger keeps teasing me and then swimming away, ah well. These ones will be good enough.
User
Low dose tea tree oil?
I’m like 70% sure this is just tea tree oil, but even so it works for fungi and helped clear up my beta’s fin rot.
User
Great
Easy and safe to use, I bought it to treat my betta fish got injuried with white Pimple on the skin it was small and got bigger and bigger, I tryed the methanol blue and salt but it didnxt work, after using the Melafix for 5 days it started healing and getting better. The price was a way cheaper than the pet store.
User
This stuff is Magick
This stuff is magick... I have a betta that I've had since the baby and I'm very bonded to. He started staying on the bottom a lot and I noticed he had something on his eye I had different water treatment here so I started that so for two weeks he stayed on the bottom... Everyday I kept thinking he was not going to be alive I didn't know how else to help him it was very stressful. I think the other product maybe kept him stable but did not do what I needed. So I went looking for something different I found this. And OMG fourth day and my betta is swimming again... After 2 2 1/2 weeks on the bottom.. thinking he was dying he is now full of life and swimming after treating the water with this. I was so surprised today to see him off of the bottom that I couldn't believe my eyes literally a miracle.. We still have a ways to go but it looks hopeful...I'm so thankful this saved his life
User
I’ll buy again
They do exactly what they were saying they do. I’m happy and I buy again.
User
Didnt heal my fish
I ordered this item thinking that it would heal my Betta fishes fin rot. Now, im not saying the product is bad by any means because it definitely prevented it from getting any worse. I would get this if your more trying to stabilize whatever your fish has going on. But it will NOT heal it. If your looking to actually heal a problem with your fish try KanaPlex. This picture shows my Betta Fishes tail after 14 days of MELAFIX (with 30% water change in between the 7 day mark following products instructions)
User
Creo que cumple su función
Parece que el tratamiento es efectivo, no soy veterinario y si mueren mis peces puede ser por otros agentes o causas.En cualquier caso tener este producto y aplicarlo a mis peces me da una tranquilidad
User
Ottimo prodotto
OrdinatO di nuovo
User
Perfect ! Just buy it and see the magic
I am a veteran in this hobby so this review would definitely help you in saving your fish from critical condition (whenever you read ) . I recently set up a 75g cichlid community tank . After a few days I observed two of my Oscars had white spots and two parrots were having swim bladder. I had given up on my fishes after raising temperature,feeding green peas and adding salt to the tank .I had read alot about this product and decided to give it a try .After adding this continuously for two days I saw instant changes in my tank . Though one of my parrot died but I was able to save all of them .Though costly I merged it with api pimafix and saved my fished .Now I have 7 Oscars 4 parrots 2 gt all happily set up . Kudos Amazon and api
User
Five Stars
fonctionne très bien, mon poisson rouge avait les yeux blancs, et ça l'a guérit
User
Love this ❤️
Been using this for my aquarium 👍🏼
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