Dealing with Betta Fish Popeye & Bulging Eyes

Betta fish popeye, also known as bulging eyes or exophthalmia, is a condition in which one or both of a betta fish’s eyes bulge outwards. This is swelling caused by a buildup of fluid or an infection behind the eye.
Understanding Bulging Eyes & Popeye
- Bulging eyes, or exophthalmia, is a condition where one or both of your betta’s eyes protrude abnormally. This can be caused by various factors, including:
- Bacterial infections
- Physical injuries
- Poor water quality
- Parasites or fungal infections
- Recognizing the symptoms early is crucial for effective treatment.
Look out for:
- Protruding eye(s)
- Cloudy or white film over the eye
- Redness or swelling around the eye socket
- Lethargy and loss of appetite

Caring for Your Betta: Prevention and Treatment
Preventing and treating bulging eyes in betta fish involves maintaining optimal tank conditions and providing prompt care when issues arise. Here are some tips:
- Maintain excellent water quality through regular changes and proper filtration – check your water with a testing kit!
- Avoid overcrowding and provide a stress-free environment
- Use safe, smooth decorations to prevent injuries
- Quarantine new fish before introducing them to your main tank
- Provide a nutritious, varied diet to boost your betta’s immune system
- Use Kanaplex, which is an anti-bacterial treatment
- You can also improve tank conditions with aquarium Epsom salt.
If you notice signs of popeye, act quickly. Isolate the affected fish, improve water conditions, and consider using Kanaplex medication.