Around the middle of November, I placed this blue angelfish in a 20 gallon tank by himself. It's easier and less costly to treat a small tank than a larger one, and I don't run the risk of healthy fish building up an immunity to antibiotics by focusing only on treatment of the ill fish.
In the photograph on the right, you can clearly see how much larger one eye is than the other. Popeye can occur due to an injury or to bad water conditions. Since I change 25%-33% of the water each week and monitor the quality, I deduced that this fish most likely injured himself in the community tank.
I am happy to report, however, that he is doing much better now. Within the week, he will be ready to return to the community tank.
Here he is below in a recent video. You can see the swelling in his eye has been reduced significantly and he acts like he's feeling much better - especially evidenced by his increasing appetite.
Find out tomorrow what I did to bring him back to peak health.