---
product_id: 2417878
title: "MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle"
brand: "api"
price: "€ 11.15"
currency: EUR
in_stock: true
reviews_count: 13
category: "Api"
url: https://www.desertcart.ie/products/2417878-melafix-freshwater-fish-bacterial-infection-remedy-4-ounce-bottle
store_origin: IE
region: Ireland
---

# Heals in ~7 days Natural tea tree extract 5 ml per 10 gallons dosing MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle

**Brand:** api
**Price:** € 11.15
**Availability:** ✅ In Stock

## Summary

> 🌿 Heal your fish, flaunt your care — because your aquarium deserves the best!

## Quick Answers

- **What is this?** MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle by api
- **How much does it cost?** € 11.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/2417878-melafix-freshwater-fish-bacterial-infection-remedy-4-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

- • **Rapid Recovery:** Visible fin and tissue repair within just one week
- • **Precision Dosing:** Easy 5 ml per 10 gallons ensures safe, effective treatment
- • **Botanical Powerhouse:** Harnesses natural tea tree extract for rapid antibacterial action
- • **Tank-Friendly Formula:** Won't harm biological filters or alter water clarity
- • **Stress-Free Quarantine:** Prevents disease outbreaks in new fish introductions

## Overview

API MELAFIX is a 4-ounce freshwater fish remedy that uses natural tea tree extract to treat bacterial infections and promote fin and tissue regeneration. Designed for daily dosing over 7 days, it prevents disease spread in new fish and maintains aquarium health without affecting water quality or filtration.

## 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: Works - It worked. It took seven days and some prayers but the popeye is gone from my betta. It was enormous.
Review: 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!

## Features

- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002567SM |
| ASIN  | B0002567SM |
| Best Sellers Rank | #7,537 in Pet Supplies ( See Top 100 in Pet Supplies ) #5 in Fish Medication & Health Supplies |
| Brand Name | API |
| Color | Black |
| Country of Origin | United States |
| Customer Reviews | 4.5 4.5 out of 5 stars (2,741) |
| 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 |

## Product Details

- **Brand:** API
- **Item Form:** Liquid
- **Item Weight:** 136.08 Grams
- **Liquid Volume:** 4 Fluid Ounces
- **Manufacturer:** Mars Fishcare

## Images

![MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle - Image 1](https://m.media-amazon.com/images/I/71pzBihgaWL.jpg)

## Questions & Answers

**Q: How to use for a 3 gallon tank for one fish?**
A: I use Melafix  when I am cleaning the pond.  I take out 25 % water then add fresh water, then add the appropriate amount of melafix.  It helps the fish adapt to the new water.  Also helps heal any sores they might have.  They seem to really like it.  I also put in the appropriate amount of salt for them as well. Hope this helps.

**Q: Is this safe for mystery snails?**
A: The bottle does not say that it will hurt snails. It has warnings for other things. However, we have not tried it in the bowl with the mystery snails.

**Q: Does it realy work?**
A: it depends what the problem is, you are having. as if per advise on the bottle, it works for all these, and pumafix does also. these, or one takes care of some bacterial issues also. you can try on bacterial and if it does not improve move to an antibiotic, best from  thomas labs on the net. these are good products and do help many situations. good luck with yours, my advise to you is what i do what these.

**Q: Mi pecera coge 3 galones gue cantidad debería usar ??**
A: Dosing for a 3gallons with Melafix (5ml for 10gallons) would be 1.5mls or 30drops.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works
*by A***E on January 19, 2026*

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

### ⭐⭐⭐⭐⭐ Fish saver!
*by B***A on November 14, 2025*

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!

### ⭐⭐⭐⭐⭐ 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.

## Frequently Bought Together

- API MELAFIX Freshwater Fish Bacterial Infection Remedy 4-Ounce Bottle
- API LIQUID SUPER ICK CURE Fish remedy, Freshwater and Saltwater Fish Medication 4 fl oz(Pack of 1), White
- API AQUARIUM SALT Freshwater Aquarium Salt 36-Ounce Box

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ie/products/2417878-melafix-freshwater-fish-bacterial-infection-remedy-4-ounce-bottle](https://www.desertcart.ie/products/2417878-melafix-freshwater-fish-bacterial-infection-remedy-4-ounce-bottle)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-22*