My betta, Flat Pat, has popeye and fin rot. This probably happened because during the time where I was going through severe depression, I was unable to care for him. Now that I'm better, I'm able to care for him. I am currently treating the fin rot with API Pimafix. In order to treat him with Pimafix, I also needed an airstone to keep the water oxygenated. Today, I got the airstone set up in the tank. He is mesmerized by all the bubbles. Today is day 1 of treating his fin rot.