Why is my Betta fish's tail fuzzy and she won't eat or move?

Question

My Betta Fish has weird fuzzy tan stuff stuck around her tail. When it falls it pulls off the scale it's on. I think I can see her tailbone to. She bearly moves or eats her fish food. Pet's info: Fish | Betta | Female

Angel Alvarado, LVT · Accepted Answer

This could be either a bacterial infection, such as Columnaris, or a fungal infection, such as Saprolegnia. It is difficult to say without an exam or image. Either can be treated with medications found in the aquarium section of the local Petco. Look for an antifungal or antibiotic. You may even find a combination product. Follow label directions carefully and remove the carbon filter insert during treatment. Maintain pristine water quality via filtration and regular partial water changes. If an antifungal does not work, try an antibiotic or vice versa. Keep water temp between 78 F and 80 F.

Why is my Betta fish's tail fuzzy and she won't eat or move?

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