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What are the best medications for my Betta's fin rot and velvet?

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male | 1 year and 1 month old

I think that my male Betta may have fin rot. Possibly velvet as well, but I am not sure. I wanted to know what medications are best for treating it. The first two photos are of him today. One with flash and one without. The last photo was taken around 5 months ago.

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1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on January 20th, 2018

Maintaining pristine water quality is the best way to manage most illnesses in fish. The addition of plain aquarium salt (NOT table salt). Can also be quite beneficial. Dissolve 1 teaspoon of salt per gallon of water in a cup of tank water and gently pour it into the tank. Treat for 10-14 days then reassess fin condition. Velvet is effectively treated using malachite green. You can find it in the aquarium section of the local pet or fish store. Follow label directions carefully and remove the carbon filter insert during treatment if indicated. It can be used concurrently with aquarium salt. Limit light to 6-8 :ours daily during treatment and increase water temp between 82F and 86F. This will aid in treatment and recovery.

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