Sigh. You might remember that a few weeks ago I bought an Oscar and a Gold Severum to add to my years-old 100 gallon tank. Well, first the Severum got covered in ich, which I treated successfully. When I came home from work last night, I saw that he has a greatly distended left eye! I made that oh-my-gosh-the-pet-store-closes-in-20-minutes mad dash to Petsmart and bought some Maracyn 2. I got home, changed about 25% of the water and then dosed the tank as directed. Unfortunately I do not currently have a quarantine tank set up. I researched as much as I could about Pop Eye, and it seems as if there are as many different causes as there are suggested cures. I've had aquariums my whole life, but have never dealt with this...I guess my 2 questions are: am I treating this correctly, and what is the likelihood that he will recover?