---
product_id: 1627846
title: "API MELAFIX Freshwater Fish Bacterial Infection Remedy 8-Ounce Bottle"
brand: "api"
price: "$32.17"
currency: USD
in_stock: true
reviews_count: 13
category: "Api"
url: https://www.desertcart.us/products/1627846-api-melafix-freshwater-fish-bacterial-infection-remedy-8-ounce-bottle
store_origin: US
region: United States of America
---

# 7-day treatment cycle Natural tea tree extract 8 fl oz liquid formula API MELAFIX Freshwater Fish Bacterial Infection Remedy 8-Ounce Bottle

**Brand:** api
**Price:** $32.17
**Availability:** ✅ In Stock

## Summary

> 🐠 Keep your aquatic community thriving—because your fish deserve the best!

## Quick Answers

- **What is this?** API MELAFIX Freshwater Fish Bacterial Infection Remedy 8-Ounce Bottle by api
- **How much does it cost?** $32.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/1627846-api-melafix-freshwater-fish-bacterial-infection-remedy-8-ounce-bottle)

## Best For

- api enthusiasts

## Why This Product

- Trusted api brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Legacy:** Over 50 years of proven aquarium care innovation
- • **All-Natural Defense:** Botanical tea tree extract fights infections without harsh chemicals
- • **Rapid Healing Power:** Heals bacterial infections & regenerates fins in just 7 days
- • **Tank-Friendly Formula:** Won't alter pH, discolor water, or harm beneficial bacteria
- • **Stress-Free Transition:** Prevents disease outbreaks in new fish introductions

## Overview

API MELAFIX is an 8-ounce liquid antibacterial remedy formulated with natural tea tree extract to rapidly heal bacterial infections, damaged fins, ulcers, and open wounds in freshwater fish. Designed for daily use over 7 days for treatment or 3 days as a preventive when adding new fish, it protects your aquarium without affecting water clarity, pH, or beneficial bacteria. Trusted by aquarists for over 50 years, MELAFIX ensures a healthier, vibrant aquatic environment.

## Description

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.

Review: 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.
Review: It works well in saltwater and freshwater saved all my fishes 5 star - It saved my freshwater and saltwater fishes and it safe for plants and corals if you add new fish or have sick fish I strongly recommend you to use this safe medication it says 7 days but I used more then 7 days till I see my fish healthy, and clean from spots

## Features

- Contains one (1) API MELAFIX Freshwater Fish Bacterial Infection Remedy 8-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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002567SW |
| ASIN  | B0002567SW |
| Allergen Information | Apple Free |
| Best Sellers Rank | #2,211 in Pet Supplies ( See Top 100 in Pet Supplies ) #12 in Aquarium Water Treatments |
| Brand Name | API |
| Customer Reviews | 4.5 4.5 out of 5 stars (15,035) |
| Date First Available  | June 20, 2004 |
| Department  | Medication |
| Global Trade Identification Number | 00317163080115 |
| Is Discontinued By Manufacturer  | No |
| Item Form | Liquid |
| Item Type Name | Aquarium Antibacterial Remedy |
| Item Weight | 0.6 Pounds |
| Item model number  | 11H |
| Liquid Volume | 8 Fluid Ounces |
| Manufacturer | Mars Fishcare |
| Manufacturer  | Mars Fishcare |
| Manufacturer Part Number | 11H |
| Model Number | 11H |
| Product Dimensions  | 5 x 2 x 12 inches; 9.6 ounces |
| Target Species | Fish |
| UPC | 317163080115 317163480113 |
| Unit Count | 8 Ounce |

## Product Details

- **Brand:** API
- **Item Form:** Liquid
- **Item Weight:** 0.6 Pounds
- **Liquid Volume:** 8 Fluid Ounces
- **Manufacturer:** Mars Fishcare

## Images

![API MELAFIX Freshwater Fish Bacterial Infection Remedy 8-Ounce Bottle - Image 1](https://m.media-amazon.com/images/I/71aqAGslwPL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: could you use this when quarantining fish?**
A: API suggests to use Melafix AND Pimafix together for Flukes and Parasitic Worms OR use General Cure for 7 days - what ever you treat with also add heat to 85-86 degrees to kill ICH along with Flukes and Parasites. That covers them all :) That’s what I do BUT YOU MUST add a few air stones because heat and meds take up a lot of oxygen. The air stones will keep the oxygen in and circulate the water. use a few Gallons in a container or tank and change the full water everyday to match the temp, redose just the right amount for the same water you change. Changing the full water daily gets rid of dead parasites, bacteria and fungus. I have used both ways but like General Cure and heat for QT better. If after General Cure treatment and the fish still have some sort of fungus or bacteria skin problem.... then QT 7days again with just Melafix and Pimafix so they can heal completely before putting them in display tank. Also when ready to move the QT fish(s) to Display tank... raise the heat in your display tank to 85-86 for a week just to be safe ALL fish in the tank are clear of ICK so no one will have an outbreak from stress while the new fish is adjusting. This works 100% of the time for me and everyone stays healthily while adjusting.

**Q: Why the bootle of 8oz said melaleuca 1%  and when i select the bootle of 16oz said pimenta ..why??**
A: pimenta is stronger. they probably assume you have a big tank and big fish, but it works well with smaller fish

**Q: How does this affect the chemistry of the water? Does it increase Nitirite? Thank you.**
A: It shouldn't affect your water chemistry at all.

**Q: can i use this with ich-x????**
A: No, it will kill your fish. Don't use this product at all. It is basically melaluca oil and it will clog your fish's gills and they suffocate to a slow death. This should not be sold as a fish remedy, but as a fish euthanizer. API should be ashamed of themselves. My poor goldfish. :(

## Customer Reviews

### ⭐⭐⭐⭐⭐ This is a great product
*by B***Y on August 25, 2025*

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.

### ⭐⭐⭐⭐⭐ It works well in saltwater and freshwater saved all my fishes 5 star
*by S***N on March 11, 2026*

It saved my freshwater and saltwater fishes and it safe for plants and corals if you add new fish or have sick fish I strongly recommend you to use this safe medication it says 7 days but I used more then 7 days till I see my fish healthy, and clean from spots

### ⭐⭐⭐⭐⭐ Easy to use and effective
*by M***P on February 25, 2026*

Had what looked looked like a bacterial infection brought into the tank by a new fish. This product was easy to use, no temp increase needed, and no discoloration. Just made the water kind of foamy. Cleared things up in no time!

## Frequently Bought Together

- API MELAFIX Freshwater Fish Bacterial Infection Remedy 8-Ounce Bottle
- API LIQUID SUPER ICK CURE Fish remedy, Freshwater and Saltwater Fish Medication 4 fl oz(Pack of 1), White
- API PIMAFIX Antifungal Freshwater and Saltwater Fish Remedy 8-Ounce Bottle (10H)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-04-27*