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🌿 Heal your fish, protect your aquarium — naturally and fast!
API MELAFIX is a 16-ounce liquid antibacterial remedy formulated with natural tea tree extract to treat and heal bacterial infections, fin rot, ulcers, and open wounds in freshwater fish. Safe for daily use, it supports rapid tissue regeneration without harming aquarium balance or water clarity. Ideal for treating infections and preventing disease in new fish, API MELAFIX has been a trusted solution for over 50 years, helping aquarists maintain vibrant, healthy aquatic communities.



















| ASIN | B0002567T6 |
| Allergen Information | Apple Free |
| Best Sellers Rank | #2,644 in Pet Supplies ( See Top 100 in Pet Supplies ) #17 in Aquarium Water Treatments |
| Brand | API |
| Brand Name | API |
| Customer Reviews | 4.5 out of 5 stars 15,151 Reviews |
| Global Trade Identification Number | 00317163100110 |
| Included Components | API MELAFIX Freshwater Fish Bacterial Infection Remedy 16-Ounce Bottle |
| Item Form | Liquid |
| Item Type Name | Aquarium Antibacterial Remedy |
| Item Weight | 454 Grams |
| Liquid Volume | 16 Fluid Ounces |
| Manufacturer | Mars Fishcare |
| Manufacturer Part Number | 11J |
| Model Number | 11J |
| Number of Packs | 1 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 317163100110 |
| Unit Count | 16 Ounce |
B**Y
This is a great product
I love this stuff! It healed my fish back to her happy normal self! She had severe fin rot and a clouded eye. You just have to pay attention the the dosing instructions and adjust dosing measurements accordingly, based on the size of your hospital tank. I will say (as I didn't know this initially) it is best to fast your fish during the treatment process. This information is not included in the directions - I had to research and figure this out on my own. This way the medication can do its job effectively. Depending on the severity of your fish's illness - more than one treatment may be required. With time, patience, research specific to your fish, etc you will get your fish back to a healthy state in no time.
R**D
works as advertised,. not a miracle, just a good treatment
One day and we've already noticed a difference I'm glad I found the advice to use this product We will keep it in stock The fish we were treating she is absolutely calm right now showing no stress at all She had damage to her slime coat from being picked down by smaller fish It's already healing!
A**S
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.
A**E
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.
R**M
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
A**A
Fish Meds
I used this on my 2 year old betta and he's still going strong. Definitely worth the monies
B**E
works well
a tiny bit, and my fish were made well
M**N
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)
A**O
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
S**A
Ottimo prodotto
OrdinatO di nuovo
A**Z
Five Stars
fonctionne très bien, mon poisson rouge avait les yeux blancs, et ça l'a guérit
E**.
Love this ❤️
Been using this for my aquarium 👍🏼
C**N
livraison bien arrivée
livraison bien arrivée
Trustpilot
1 week ago
1 month ago