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My betta fish has two black patches that resembles eczema on the side of her body and a very small whole on her anal fin. Help

My betta fish has two black patches that resembles eczema on the side of her body and a very small whole on her anal fin. Help

Updated On November 17th, 2017

Pet's info: Fish | Unknown - Fish | Female

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

This question includes photos that may contain sensitive content. Click to view.

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The black patches may be due to elevated ammonia levels. This may cause "burns" on scales. Perform a partial water change immediately. Use only aged or conditioned water that is temperature matched (78 F to 80 F) to prevent further stress or shock. Poor water quality can lead to fin rot or infection. This can be remedied, in most cases, by maintaining water quality. You can add a bit of plain aquarium salt (NOT table salt) to aid healing and reduce stress. One teaspoon of salt per gallon of water is recommended. Dissolve it completely in a cup of tank water then gently pour it into the tank.

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