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What Fish Medication Do I Use To Treat Fin and Tail Rot on Goldfish?

Here you will learn how to treat fin and tail rot on goldfish and find out what medication will heal your sick fish. First thing you need to do is make sure you properly diagnose your goldfish's sickness. Fin and tail rot is quite noticeable by simply observing the fins and tail slowly being eaten away and deteriorating. It will be light pinkish to red when bacterial infections begin to set in. When you notice signs and symptoms of disease you need to treat your goldfish right away as it's fairly easy to treat in the early stages. Using the right fin and tail rot medication, it will clear up in no time.

Fish Medications Used To Treat
 Fin and Tail Rot

There are several fish medications you can use to treat your goldfish that may have fin and tail rot. One of the first ones you can use is Melafix an All-Natural Antibacterial remedy for the treatment goldfish and koi diseases. A very effective treatment for bacterial infections like ulcers, cloudy eyes, mouth fungus, open wounds and damaged fins.

Treating Fin and Tail Rot With Melafix

  1. Quarrantine your sick goldfish in a seperate fish tank.
  2. Remove activated carbon from your filter and make sure you shut off the uv sterilizer if you have one.
  3. Add 1 teaspoon (5ml) of Melafix for every 50 gallons of water. For severe cases of fin and tail rot double the dosage to 2 teaspoons per 50 gallons.
  4. Follow directions on bottle and repeat dosage as stated. Please not water will foam up when you add it to your aquarium, this is normal.

You can buy Aquarium Pharmaceuticals® MelaFix (16oz) online which is cheaper then in pet stores


Treating Fin and Tail Rot With Kordon Formalin3 (Melachite Green)

  1. Quarrantine any sick fish in a seperate aquarium.
  2. Remove activated carbon from your aquarium filter and shut off uv sterilizer
  3. Wear safety goggles and gloves when using malachite green as it stains clothes and is a carcinogen.
  4. Before beginning treatment do a 25% partial water change.
  5. Add 1 teaspoon (5 ml) of melachite green per every 50 gallons. Do not add directly to the aquarium, dilute in in some water then slowly add.
  6. Make sure aeration is at it's maximum during the treatment process.
  7. Observe your fish for any signs of severe stress, gasping and clamped fins. If so add activated carbon and do an immediate 25% water change. All fish go through some degree of stress, use your judgement.
  8. After 24 hours repeat the process, perform a 25% water change then add more malachite.
  9. Repeat above procedures for 7 days, if not totally healed begin treatment for fin and tail rot again.


You can buy Kordon Formalin3® Treatment and Dip - 16oz online cheaper then it would be in pet stores.

Remember most all goldfish diseases, illnesses and parasites can be prevented. Perform regular maintenance procedures and take care of your goldfish properly and you should have no problem with fin and tail rot or other sickness. If your goldfish do get fin and tail rot the above fish medication treatments will work and get their health back to normal.

TIP: Always make sure you have some fin and tail rot medication on hand in case of infection. Treating fin and tail rot in early stages with the right fish medication will increase your chances of success.

TIP: Buy fin and tail rot medication online, it is cheaper and you'll save some money.


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