Effective Anti-Bacterial Medication for Fish Health

API Melafix Anti Bacterial Medication is an all-natural, safe and effective solution to treat and prevent bacterial infections in your fish. Designed for use in fresh and saltwater aquariums, Melafix promotes healing in common ailments like open wounds, abrasions, fin and tail rot, eye cloud, and mouth fungus. This 118ml bottle does not adversely affect biological filters, alter pH levels or discolour the water. However, please note it is not suitable for fish meant for consumption.

Features and Benefits

  • Safe and Natural: API Melafix contains natural active ingredients that effectively treat bacterial infections without harming your fish or plants.
  • Promotes Rapid Healing: Melafix heals open wounds, damaged fins, and tissues in your fish, preventing further bacterial infection.
  • Effective Disease Treatment: Treats common bacterial diseases like fin and tail rot, eye cloud, and mouth fungus effectively without causing harm to other fish.
  • No Impact on Water Quality: The medication will not alter the pH of your aquarium water, affect the biological filter or change the water's colour.
  • Compatible with Fresh and Saltwater Aquariums: Suitable for both freshwater and marine aquariums, ensuring the well-being of your diverse aquatic life.

How to Use

  1. Shake the bottle well before use.
  2. If activated carbon is present in the aquarium, remove it prior to medication.
  3. To treat diseases or wounds, add 5ml of API Melafix for every 40L of water. Dose daily for 7 days, followed by a 25% water change. Continue treatment if necessary.
  4. For preventing disease when adding new fish, dose daily for 3 days using the same 5ml per 40L of water dosage.

Aqua Gardening Suggests These are Best For

API Melafix Anti Bacterial Medication is best suited for aquarium hobbyists who want a reliable and natural treatment for bacterial infections in their aquarium fish. It is also suitable for those adding new fish to their tanks and want to reduce the risk of introducing diseases to other aquatic life. This medication is perfect for both fresh and saltwater aquariums.


What is API Melafix Anti Bacterial Medication used for?

API Melafix Anti Bacterial Medication is an all-natural treatment that heals open wounds, abrasions, treats fin and tail rot, eye cloud, and mouth fungus in fish. It also promotes the re-growth of damaged fins, rays, and tissue. This medication reduces the risk of diseases in fish during the transition from store to home.

How should I use API Melafix Anti Bacterial Medication?

Shake the product well before using. For disease or wound treatment, dose daily for 7 days. After 7 days, perform a 25% water change and continue treatment if necessary. When adding new fish, dose daily for 3 days.

What is the recommended dosage for API Melafix Anti Bacterial Medication?

The dosage is 5ml per 40L of water.

Can I use API Melafix Anti Bacterial Medication for both freshwater and saltwater fish?

Yes, API Melafix can be used in both freshwater and saltwater environments.

Will API Melafix Anti Bacterial Medication affect the biological filter or alter the pH levels in my aquarium?

No, API Melafix will not adversely affect the biological filter, alter the pH, or discolour the water in your aquarium.

Is API Melafix safe for live plants in my aquarium?

Yes, API Melafix is safe for plants in your aquarium.

Can I use API Melafix for fish that will later be eaten?

No, API Melafix Anti Bacterial Medication is not safe for fish that are intended for consumption.

Do I need to remove activated carbon from my aquarium before using API Melafix?

Yes, remove activated carbon from your aquarium before using API Melafix Anti Bacterial Medication.

Still Unsure if This Product is Right for You?

  • Submit a question via the Reviews & Questions tab on this page, and our team will respond to you
  • Login to check your Aqua Gardening Member Price
  • Book a free Consult with the Aqua Gardening team here
  • Still Overwhelmed? Start your Gardening Journey with a free eBook here

(SKU: 127452)

Shipping Calculator

Enter the quantity of product and your Australian suburb name to calculate the shipping costs for multiples of this item only. You can calculate the shipping costs for your entire order, including international orders, on the Cart Page.

Free Shipping Eligibility

Aqua Gardening offers free shipping on most orders above $249 that are not bulky items.  Once you place all the items you wish to buy in the cart, the combined shipping price will be shown in the cart, including Free Shipping if you are eligible. For full details please see our free shipping eligibility here.

Delivery Information

Back Order products

These are products we usually carry in stock but are temporary out of stock. These products will be back in stock within a few days. We can send you an email notification when they are back in stock if you click on the “Notify me when back in stock” link. See the full details here.

Click & Collect Only products

These products can only be collected from our Brisbane showroom as we can not ship them. If you place any of these products in your cart, you will only see the Click & Collect option at the checkout.

Fast Dispatch products

These are products that we have in stock in our Brisbane showroom, and they are available for immediate Click & Collect or Shipping. Keep in mind that if you have a product which is not listed as a Fast Dispatch product in your cart, there might be a delay on your order. See the full details here.

Special Order products

Special Order products are products that we do not regularly stock. These products will be ordered specially for you, or dispatched directly to you from our supplier. See the full details here.

Ship-To-Store products

Products marked with ship-to-store can still be shipped to us to collect in-store! Simply check out with the shipping address: 3/4 Billabong Street, Stafford, QLD, 4053. Once your order arrives, we’ll email you to let you know that it is ready to collect.


Limited Warranty - This product has been stored in a controlled environment to ensure you will receive the best quality product possible. Due to this reason this product is sold on a strict no refund or return policy, unless it falls under a warranty claim.


60 Day Returns - Not available for this product, please contact us if you have any issues. More details...