

🌿 Heal your fish, protect your aquarium — naturally and fast!
API MELAFIX is a 4-ounce freshwater fish bacterial infection remedy that uses natural tea tree extract to quickly heal bacterial infections, damaged fins, ulcers, and open wounds. Safe for aquarium ecosystems, it maintains water pH and biological filters without discoloration. Ideal for treating infections with daily dosing over 7 days and preventing disease in new fish with a 3-day regimen. Trusted by aquarists for over 50 years, it ensures healthier fish and a thriving tank environment.



















| ASIN | B0002567SM |
| ASIN | B0002567SM |
| Best Sellers Rank | #8,187 in Pet Supplies ( See Top 100 in Pet Supplies ) #6 in Fish Medication & Health Supplies |
| Brand Name | API |
| Color | Black |
| Country of Origin | United States |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,725) |
| Date First Available | June 20, 2004 |
| Date First Available | June 20, 2004 |
| Department | Unisex-Adult |
| Department | Unisex-Adult |
| Directions | Use when adding new fish to an aquarium, and to treat symptoms like open red sores, fin & tail rot, eye cloud, pop eye, body slime & mouth fungus, open body wounds. Shake well, and remove activated carbon, if possible. Add 1 teaspoon (5 ml.) per 10 U.S. gallons (38 L) of water. For diseased or wounded fish, dose daily for 7 days. After 7 days, perform a 25% water change, continuing treatment if ne… |
| Is Discontinued By Manufacturer | Yes |
| Item Dimensions LxWxH | 5 x 2 x 12 inches |
| Item Package Dimensions L x W x H | 6.06 x 1.46 x 1.42 inches |
| Item Weight | 136.08 Grams |
| Item model number | 11G |
| Item model number | 11G |
| Manufacturer | Mars Fishcare |
| Manufacturer | Mars Fishcare |
| Material | Plastic |
| Model Name | MELAFIX, 4 OZ |
| Number of Items | 1 |
| Product Dimensions | 5 x 2 x 12 inches; 4.8 ounces |
| Size | 4-Ounce |
| Style | Freshwater |
| Target Audience Keyword | fish, fish;algae-eaters; betta-fish; bottom-feeder-fish; cichlid-fish; goldfish; invertebrate-fish; mollusks; octopuses; rays; sharks; snails |
G**G
yippie!
worked in days on my goldfish!
B**A
Fish saver!
My goldfish Lox started to get fin rot very badly, and his demeanor changed. Within 4 days of treatment his fins started to look healthy and beautiful again. This product is excellent and affordable! There is a bit of a medicine smell to it but nothing overwhelming or bothersome! Photo shared is after 4 days, prior his back fin was almost all black!
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.
J**.
It’s working!
So far this is the only thing I’ve seen that is showing improvement in my goldfish’s fin rot. I’ve quarantined him alone in a tank, and followed directions exactly. After 5 days/and doses he’s showing signs of new healthy fin growth. Plus it does not change water color and smells like tea tree oil.
K**T
Works well!
This works well. I had an injured fish and I did one dose and he was healed. :)
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.
D**Y
Helped my sick betta
Worked perfect to help my Betta when he was sick. He was feeling better after only a few doses.
B**N
Snake oil?
Bottle came without a seal under cap and leaking in the bag it was shipped in. So not only was it leaking but now i’m unsure what was in the bottle but my fish have seemingly gotten worse since I started dosage.
E**.
Been using this for my aquarium 👍🏼
S**K
Very good product, with in 2 days of usage my flowerhorn fish head wound got recovered.
G**O
Buen producto, no se salvo mi pez, ya estaba grande
U**V
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
S**L
Wir haben dieses Mittel nach Gebrauchsanweisung benutzt. Es War ein Desaster. Am nächsten morgen hatten wir min. 10 tote Fische zu verzeichnen. Die anderen konnten durch einen sehr großzügigen Wasserwechsel gerettet werden. Da man nicht 0 Sterne vergeben kann, habe ich einen gegeben. Aber ich rate dringend von diesem Produkt ab.
TrustPilot
2天前
2 周前