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Mardel Maracyn for Goldfish Fin Rot Disease

Updated on April 15, 2013

Goldfish Disease

If only I knew about fin rot, a common disease of goldfish, my healthy and alive goldfish in a fish bowl without air pump for more than 6 months wouldn't die.

I transferred my goldfish to a big aquarium together with 3 other new and a janitor fish because I notice him getting bigger everyday. And then, after 2 months I just noticed him died already.

I observed and tried to figured out what happened, I just noticed that his fins are broken and uneven. I thought that maybe, when my goldfish died, the other fish just broke his tail. So, I just forget it until suddenly, I noticed another goldfish have ragged fin with blood stained. I asked my friend what to do and he told me about Mardel Maracyn antibiotic for freshwater fish.

Image Credit: Own Photo

Goldfish with Fin Rot Disease

goldfish fin rot disease
goldfish fin rot disease

This is the photo of my goldfish with fin rot. His tails are ragged and uneven. I also noticed some hairline blood stained in his tails. If you saw this in your goldfish I recommend you to use Mardel Maracyn. You can also ask your nearest pet shop to give you the most effective antibiotic for fish.

Antibiotic for Finrot

Mardel Maracyn-Two Powder Packets Water Treament (Freshwater), 24ct
Mardel Maracyn-Two Powder Packets Water Treament (Freshwater), 24ct

This is a very effective antibiotic for goldfish. I used this and my goldfish show positive signs. After I used this, the water on my aquarium became a little bit cloudy which is normal. This is very safe for other fish too. You do not need to transfer or isolate the sick fish for treatment. Mardel Maracyn can cure almost all kinds of goldfish diseases like fin rot and other internal or external bacterial diseases.

Antibiotic powder for fish

Treats external and internal bacterial diseases

For use in freshwater aquariums

Quick Dissolving


Goldfish Disease Symptoms

What are the symptoms you observed in your fish?

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Aquarium Water Conditioner

I also recommend this product after changing and cleaning your aquarium tank. This will help and protect your goldfish from unwanted bacteria and fungi.

API STRESS COAT Aquarium Water Conditioner 16-Ounce Bottle
API STRESS COAT Aquarium Water Conditioner 16-Ounce Bottle

Reduces fish stress and heals damaged tissue, torn fins, and skin wounds

Replaces the natural secretion of slime that is interrupted by handling, shipping, fish fighting, or other forms of stress

Reduces susceptibility to disease and infection

Use when starting a new aquarium, adding or changing water and adding fish


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    • TolovajWordsmith profile image

      Tolovaj Publishing House 4 years ago from Ljubljana

      Goldfish is beautiful and very sensitive pet. Thanks for your useful tips on fin rot disease.