API MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle
Original price was: $9.99.$8.18Current price is: $8.18.





Price: $9.99 - $8.18
(as of Oct 06, 2025 09:26:45 UTC – Details)
API MELAFIX Freshwater Fish Bacterial Infection Remedy soothes the transition from store to home by reducing the risk of your fish developing a disease. The fish you bought may already carry a disease. Disease is often difficult to detect, particularly in its early stages. Treat bacterial infections in your fish and reduce the risk of spreading illness to other fish with API MELAFIX Freshwater Fish Bacterial Infection Remedy. Bacterial diseases are caused mostly by dirty aquarium conditions and the addition of infected fish. Fish that are injured and have open wounds are especially susceptible, even in seemingly clean tanks. Bacterial infections, like fin and tail rot, eye cloud, pop eye, body slime and mouth fungus destroy tissue and other organs, and if left untreated, can cause death. API MELAFIX Freshwater Fish Bacterial Infection Remedy is an all-natural antibacterial treatment that heals open wounds, treats bacterial infections and promotes re-growth of damaged fins and tissue, usually within a week. Just add 5 ml per 10 gallons of aquarium water. It will not adversely affect the biological filter, alter the pH or discolor the water. For effective treatment, dose infected fish daily for 7 days, and continue afterward if necessary. Dose new fish daily for 3 days. Remove activated carbon from filter before use, if possible. With API Aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your fish and aquarium. API Aquarium Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results.
Is Discontinued By Manufacturer : Yes
Product Dimensions : 5 x 2 x 12 inches; 4.8 ounces
Item model number : 11G
Department : Unisex-Adult
Date First Available : June 20, 2004
Manufacturer : Mars Fishcare
ASIN : B0002567SM
Best Sellers Rank: #10,897 in Pet Supplies (See Top 100 in Pet Supplies) #7 in Fish Medication & Health Supplies
Customer Reviews: 4.4 4.4 out of 5 stars 2,639 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Contains one (1) API MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle
Heals bacterial infections and repairs damaged fins, ulcers and open wounds
Contains natural, botanical tea tree extract to quickly and rapidly help fish
Helps treat newly-introduced fish to reduce risk of disease outbreak in freshwater aquariums
Use daily for a week when treating infections and for 3 days as a preventive when adding new fish
Customers say
Customers report that the water treatment works wonders, healing fish within 3 days. Moreover, the product receives positive feedback for its quality, with one customer noting it’s particularly good for Betta ailments. However, there are mixed experiences with fish health – while some report their fish becoming healthy again, others mention their fish died after using it. Additionally, the color quality and smell receive mixed reactions, with some saying their fish looked more vibrant while others report cloudy eyes. Moreover, customers disagree on the product’s toxicity, with some warning it’s toxic for bettas, and the value for money is also debated.
13 reviews for API MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle
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Original price was: $9.99.$8.18Current price is: $8.18.
Brandi Murray –
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.
Anonymous –
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.
Ernesto Gonzalez –
Really works
SAVED OUR FISHâs LIFE!!!!!!! Bought it due to red spots and blemishes all over my daughterâs gold fish. Followed instructions but used for an additional week along with aquarium salt. Fish cleared up and no longer lethargic. My girls are happy 🙂
Jared –
Decent product but buy the bigger bottle
Helped my angel fish for awhile. But didn’t stop the spread of it to other fish. So I had to buy more to heal the other fish. In the end the angel died. So not sure if it didn’t get rid of it all the way, or if I was to late in administering the meds. Definitely need a bigger bottle cuz you go thru a lot in a 45 gallon tank.
Daniela Tejada –
Excelente producto
Un producto excelente para combatir algunos malestares de los peces, realmente como dice en las instrucciones al dÃa 01 vimos los resultados, uno de mis peces tenÃa la cola como rasgada y dañada, actualmente se le regeneró y goza de muy buena salud.
K –
Made a world of difference!
I honestly don’t usually write reviews on the things I buy here on Amazon, but this is worth taking the time to write a review. I was almost afraid to buy this product because of some of the negative reviews, but I was worried about Kepler (my beautiful Betta you see in the pictures) and decided that I would take a chance that it would work, rather than just leaving it go. I couldn’t have been happier with the product! I had him in a 1 gallon bowl. As you can see from the pictures of before, his dorsal fin on top was all ratty and clear, and his tail and anal fin were also torn up in spots. If you look at the present picture (the blue-ish one), this is him a week and a half later in his new aquarium. His top fin is almost completely healed, his tail is nice and round again, and his fins are growing back quickly! His color is also better! I honestly think that this saved my fish. I gave him two droplets with an eyedropper in the tank every day, during which time I turned on the air stone in his tank (not sure if that made a difference; that’s just what I did) until it got better. On the last day, before I put him in the new tank, I gave him water with a bit of aquarium salt in it just as an extra precaution. Please don’t be scared away by the negative reviews! I daresay that, for the majority of those, the fish would have died with or without this treatment. API wouldn’t sell it if it killed fish!
Bryan –
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 iâm unsure what was in the bottle but my fish have seemingly gotten worse since I started dosage.
Callisto –
Guppy wasting disease
My female guppy that I’ve had for a little while she had what is called guppy wasting disease and I use this put her in the hospital tank with a heater. She was incredibly skinny and almost transparent colored now she got her appetite back and is gaining weight.When you research this disease online a lot of people will tell you that it’s terminal but I don’t think so I think you should give them a chance.Just follow the instructions on the bottle measure it properly and change out the water . Just have some prepared water on the side for water changes. Also make sure to use an air stone the combination of all that has been advised will really help your fish .
Emma B. –
Been using this for my aquarium ðð¼
swasthik –
Very good product, with in 2 days of usage my flowerhorn fish head wound got recovered.
Gonzoclaro –
Buen producto, no se salvo mi pez, ya estaba grande
Utsav –
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
Sissel –
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 groÃzügigen Wasserwechsel gerettet werden.Da man nicht 0 Sterne vergeben kann, habe ich einen gegeben. Aber ich rate dringend von diesem Produkt ab.