API

API MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle

$8.18$11.58

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About this item

  • 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
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Product details
BrandAPI
Liquid Volume4 Fluid Ounces
Item Weight136.08 Grams
Item FormLiquid
ManufacturerMars Fishcare
Technical specifications
item_weight136.08 Grams
departmentUnisex-Adult
manufacturerMars Fishcare
item_model_number11G
date_first_availableJune 20, 2004
item_package_dimensions_l_x_w_x_h6.06 x 1.46 x 1.42 inches
item_dimensions_lxwxh5 x 2 x 12 inches
brand_nameAPI
target_audience_keywordfish, fish;algae-eaters; betta-fish; bottom-feeder-fish; cichlid-fish; goldfish; invertebrate-fish; mollusks; octopuses; rays; sharks; snails
directionsUse 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 necessary. For adding new fish, dose daily for 3 days.
country_of_originUnited States
model_nameMELAFIX, 4 OZ
colorBlack
size4-Ounce
materialPlastic
number_of_items1
styleFreshwater
is_discontinued_by_manufacturerYes
product_dimensions5 x 2 x 12 inches; 4.8 ounces
best_sellers_rank#8,006 in Pet Supplies ( See Top 100 in Pet Supplies ) #6 in Fish Medication & Health Supplies

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Customer reviews

4.52,779 ratings
  1. 575%
  2. 413%
  3. 313%
  4. 20%
  5. 10%

Customers say

Customers find the water treatment effective for healing sick fish, particularly Betta fish, and consider it good value for money.

★★★★★

Works

Angela IyevbeleJanuary 19, 2026✓ Verified purchase

It worked. It took seven days and some prayers but the popeye is gone from my betta. It was enormous. Read more

★★★★★

Fish saver!

BellaNovember 14, 2025✓ Verified purchase

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! Read more

Review image 1
★★★★★

This is a great product

Brandi MurrayAugust 25, 2025✓ Verified purchase

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. Read more

★★★★☆

It’s working!

Jessica S.November 24, 2025✓ Verified purchase

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. Read more

★★★★★

Saved my fish!

AnonymousOctober 23, 2019✓ Verified purchase

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. Read more

Review image 1
★★★★★

yippie!

gDecember 17, 2025✓ Verified purchase

worked in days on my goldfish! Read more

★★★★★

Works well!

Kate HimmelwrightNovember 29, 2025✓ Verified purchase

This works well. I had an injured fish and I did one dose and he was healed. :) Read more

★★★☆☆

Can and will kill fish sometimes

Zacchaeus ClayAugust 4, 2021✓ Verified purchase

Not sure how long bettas live but I had a two year old fish that died after being medicated. However I would say that you use this as a preventative medication. Read more

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