--- product_id: 67654764 title: "API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle" brand: "api" price: "€ 166.77" currency: EUR in_stock: true reviews_count: 13 category: "Api" url: https://www.desertcart.hr/products/67654764-api-melafix-freshwater-fish-bacterial-infection-remedy-1-87-litre store_origin: HR region: Croatia --- # Natural tea tree extract Safe for plants & filters 1.87L large capacity API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle **Brand:** api **Price:** € 166.77 **Availability:** ✅ In Stock ## Summary > 🌿 Heal your fish naturally, keep your tank thriving! ## Quick Answers - **What is this?** API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle by api - **How much does it cost?** € 166.77 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/67654764-api-melafix-freshwater-fish-bacterial-infection-remedy-1-87-litre) ## 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 - • **Gentle Yet Effective:** Formulated to treat infections without harming beneficial bacteria or aquatic plants. - • **Generous 1.87L Bottle:** Ample supply for multiple treatments, perfect for serious aquarium caretakers. - • **Powerful Natural Healing:** Harnesses botanical tea tree extract to rapidly heal bacterial infections and damaged fins. - • **Clear Water, Healthy Fish:** Non-clouding formula that supports a vibrant, stress-free freshwater ecosystem. - • **Proactive Disease Prevention:** Use daily for a week to treat infections or 3 days to prevent disease in new fish arrivals. ## Overview API Melafix is a 1.87-liter liquid remedy featuring natural tea tree extract designed to treat bacterial infections, fin rot, ulcers, and open wounds in freshwater fish. Safe for plants and filters, it supports aquarium health by promoting rapid healing and preventing disease outbreaks, making it an essential solution for proactive and professional fishkeepers. ## Description From the manufacturer It’s Smart To Be Proactive! The best way to keep your aquarium clean is to maintain good water quality. This will keep your fish strong and vibrant, as well as preventing disease. How Do I Maintain A Healthy Environment? It is important to test your aquarium water weekly to verify good quality in addition to a bi-weekly partial water change of no more than 25% to help reduce toxic buildup, remove debris the filter missed, and replenish the oxygen available to fish. How Do I Take Good Care Of My Aquarium? Feed & observe fish daily Test water quality weekly Change 25% water bi-weekly Restore your ecosystem monthly Feed Your Fish Daily Feed your fish twice daily only the amount of food they can eat in 2 to 3 minutes depending on the species. Some fish such as bottom feeders and algae eaters will need up to 30 minutes to 2 hours. Overfeeding & low quality nutrition cause unconsumed food and more excrement which cloud water and raise harmful ammonia levels, possibly leading to fish loss. Take time to observe fish and the water temperature to ensure they are active & healthy. Test Water Quality Weekly An aquarium is a closed environment and in order for fish to thrive, water must be similar to that which could be found in their natural environment. Poor water quality can cause fish stress, illness and even loss. The 5 common water quality parameters are Ammonia, Nitrite, Nitrate, and pH - all of which may vary over time and all are invisible to the eye which is why it is important to test weekly with API MASTER TEST KITS or API 5-IN-1 TEST STRIPS. It is also a good time to add API STRESS ZYME to keep your aquarium & gravel clean. Change 25% Water Every 2 Weeks In a closed aquarium environment there are no natural rivers or streams to carry away debris and other waste materials. It is important to renew 25% of the aquarium water every two weeks. When you change the water, it is important to know that tap water contains chemicals that make it safe for us to drink but harmful for fish, therefore add a water conditioner such as API STRESS COAT. Restore Your Ecosystem Monthly It is important to change your filter media & clean gravel monthly, however in doing so it can disrupt the fragile ecosystem of your aquarium. Use API QUICK START to strengthen it with ‘beneficial’ nitrifying bacteria that will naturally consume toxic compounds and help prevent fish stress. Also recommended when starting a new aquarium or changing the water. Making A Better Underwater World At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. Review: Gentle, effective, and easy-dose—solid remedy for fin rot, wounds, and tank recovery. - This bottle’s made to handle mild bacterial issues—natural tea tree extract that treats fin rot, ulcers, and open wounds without hammering your biofilter. Geared toward freshwater setups with sensitive fish or planted tanks. Doses clean, smells herbal, and doesn’t cloud the water. Works well in recovery setups—post-transport stress, minor injuries, or when fish start showing signs of wear. Ideal for van stash, pet kits, or home aquariums where you want low-impact treatment. Bottle’s easy to measure, and the 473ml size lasts through multiple rounds. Best used with good aeration—MELAFIX can reduce oxygen slightly, so keep your pump or air stone running. 👍 Pros ✅ Natural formula—tea tree based, gentle on fish ✅ Treats fin rot, wounds, ulcers, and abrasions ✅ Safe for plants and filters—no harsh chemicals ✅ Easy dosing—clear instructions on label ✅ Large bottle—covers multiple treatments 👎 Cons ❌ Mild strength—won’t fix severe infections ❌ Herbal scent—noticeable during dosing ❌ Needs aeration—can lower oxygen levels Review: From lifeless to spring chicken - read my review and view images - Our fish was showing signs of septicaemia with blood spots, scales peeling away, very lethargic, not eating and fins that looked damaged beyond repair, so after a full tank change with 24 hour settled water, all plants removed to prevent further damage from brushing past, I followed a set routine of daily treatment using this treatment, within 2 days she became more active, and obvious signs of repair were visible, blood spots were disappearing and her fins were slowly starting to move more freely. It’s been 10 days and apart from the damaged scales on her side that are still healing, she’s back to herself, swimming, begging for food every time she sees anyone, safe to say my son is super happy that he’s not got to say goodbye to pepper just yet. Can’t recommend this product enough, well worth the money, the size was plenty for what I needed, but I’ll just continue to use it bi daily for the next few weeks to ensure that it is fully treated and doesn’t come back. And because she’s eating again equivalent to a St Bernard ( if we let her ) there’s less debris in the tank so the tank has stayed clearer. Also I’ve just noted that pre treatment her back was arched and looked so poorly, today she’s back straight, able to buoyant herself easily. I have attached pictures from day 1 to day 10 to show the difference. Absolutely superb result. ## Features - Contains one (1) API MELAFIX Freshwater Fish Bacterial Infection Remedy 1.87-Liter 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 | B00026041M | | Best Sellers Rank | 1,421 in Pet Supplies ( See Top 100 in Pet Supplies ) 1 in Prescription Aquatic Animal Medications | | Brand | API | | Brand Name | API | | Customer Reviews | 4.5 out of 5 stars 10,712 Reviews | | Global Trade Identification Number | 00317163160114 | | Item Form | Liquid | | Item Weight | 64 Ounces | | Item form | Liquid | | Item weight | 64 Ounces | | Liquid Volume | 64 Fluid Ounces | | Liquid volume | 64 Fluid Ounces | | Manufacturer | API | | Manufacturer Part Number | 11P | | Model Number | 11P | | Target Species | Fish | | UPC | 317163160114 317163416112 | | Unit Count | 1870.0 millilitre | | Unit count | 1870.0 millilitre | ## Product Details - **Brand:** API - **Item form:** Liquid - **Item weight:** 64 Ounces - **Liquid volume:** 64 Fluid Ounces - **Manufacturer:** API ## Images ![API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle - Image 1](https://m.media-amazon.com/images/I/712Uletm11L.jpg) ![API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle - Image 2](https://m.media-amazon.com/images/I/818ECPTCZEL.jpg) ![API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle - Image 3](https://m.media-amazon.com/images/I/71pmlrvQm4L.jpg) ![API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle - Image 4](https://m.media-amazon.com/images/I/81m3UYJ08xL.jpg) ![API Melafix Freshwater Fish Bacterial Infection Remedy, 1.87 Litre Bottle - Image 5](https://m.media-amazon.com/images/I/81hZHXTo5FL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: This site list melafix from two different venders, mars and pond care. big difference in priceing. are they the same?** A: I've used several different brand types of melafix and found that they work just the same. **Q: Is it safe to use post-expiration? In other words does it turn toxic to fish or simply starts to lose the effectiveness?** A: I would think if this is not very much over date, like 6months or so, it would be fine. If it is still sealed, it will be like new or almost. If it is older, it probably, hate to say as this, but I would think it will be okay to use, and just be weaker or maybe not. If you are in doubt, I would buy a new one to be certain. In the past, they never put dates on anything, and now a days they do and the things were used and were okay. Best answers I can give you. Good luck with your issues. **Q: I guess my butterfly goldfish has fin rot. How should I treat it? It is in a pond with other healthy fish.** A: If the other fish are healthy. Then you should remove it in to a isolation tank. Be sure to use the pond water when you fill it. There are instructional videos on YouTube that will show you how. **Q: How is this different from regular strength? They both have 5% concentration in a 64 oz bottle.** A: My advice is to please ask a professional breeder for direction. Off the self purchases is "gambling" to me! Best wishes to you and the Fish :) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Gentle, effective, and easy-dose—solid remedy for fin rot, wounds, and tank recovery. *by G***E on 20 September 2025* This bottle’s made to handle mild bacterial issues—natural tea tree extract that treats fin rot, ulcers, and open wounds without hammering your biofilter. Geared toward freshwater setups with sensitive fish or planted tanks. Doses clean, smells herbal, and doesn’t cloud the water. Works well in recovery setups—post-transport stress, minor injuries, or when fish start showing signs of wear. Ideal for van stash, pet kits, or home aquariums where you want low-impact treatment. Bottle’s easy to measure, and the 473ml size lasts through multiple rounds. Best used with good aeration—MELAFIX can reduce oxygen slightly, so keep your pump or air stone running. 👍 Pros ✅ Natural formula—tea tree based, gentle on fish ✅ Treats fin rot, wounds, ulcers, and abrasions ✅ Safe for plants and filters—no harsh chemicals ✅ Easy dosing—clear instructions on label ✅ Large bottle—covers multiple treatments 👎 Cons ❌ Mild strength—won’t fix severe infections ❌ Herbal scent—noticeable during dosing ❌ Needs aeration—can lower oxygen levels ### ⭐⭐⭐⭐⭐ From lifeless to spring chicken - read my review and view images *by N***E on 12 February 2026* Our fish was showing signs of septicaemia with blood spots, scales peeling away, very lethargic, not eating and fins that looked damaged beyond repair, so after a full tank change with 24 hour settled water, all plants removed to prevent further damage from brushing past, I followed a set routine of daily treatment using this treatment, within 2 days she became more active, and obvious signs of repair were visible, blood spots were disappearing and her fins were slowly starting to move more freely. It’s been 10 days and apart from the damaged scales on her side that are still healing, she’s back to herself, swimming, begging for food every time she sees anyone, safe to say my son is super happy that he’s not got to say goodbye to pepper just yet. Can’t recommend this product enough, well worth the money, the size was plenty for what I needed, but I’ll just continue to use it bi daily for the next few weeks to ensure that it is fully treated and doesn’t come back. And because she’s eating again equivalent to a St Bernard ( if we let her ) there’s less debris in the tank so the tank has stayed clearer. Also I’ve just noted that pre treatment her back was arched and looked so poorly, today she’s back straight, able to buoyant herself easily. I have attached pictures from day 1 to day 10 to show the difference. Absolutely superb result. ### ⭐⭐⭐⭐ Aquarium antibacterial remedy *by M***E on 3 November 2025* Bought as we had a problem in the fish tank. Used this as instructed problem cleared up. Good price worked well. ## Frequently Bought Together - API MELAFIX Freshwater Fish Bacterial Infection Remedy 64-Ounce Bottle - API PIMAFIX Freshwater and Saltwater Fish Remedy 64-Ounce Bottle - API AQUARIUM SALT Freshwater Aquarium Salt 67-Ounce Box (Packaging May Vary) --- ## 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.hr/products/67654764-api-melafix-freshwater-fish-bacterial-infection-remedy-1-87-litre](https://www.desertcart.hr/products/67654764-api-melafix-freshwater-fish-bacterial-infection-remedy-1-87-litre) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-09*