As I said, popeye is usually not fatal and Mr. Betta will often fully recover. On occasion he may lose an eye. But if you catch it right away, he should be fine. Immediately do a full water change. Keep his water very clean, changing it every third day. After putting him in clean water, add the antibiotic Ampicillin to his water. It has become difficult to find on the market and can be costly, but if you can find a 12 capsule quantity, it will be well worth the $10 to $12 investment. This medication usually comes in capsules. A full capsule usually treats 10 gal of water. So for a 1/2 gallon of water, open the capsule and take the right proportion of powder and sprinkle on jar water. You may steer gently with a disposable plastic spoon. This is a white powder and will not affect the color of the water. Do not overmedicate! Once Betta’s eyes are back to normal, keep treating for one more week (just to be sure) and then stop the medication. And keep his water clean from now on darn it!!
