I woke up this morning to see that last night my GBR passed away. This little guy had one eye, presumedly from being plucked out at the fish store. He lived happily in my 20L for about two months maybe. He looked fine last night, so I'm confused as to what may have caused his demise. I had been treating him with melafix for a nipped/ripped tail, but other than that he seemed healthy with a good appetite. Water params are all at 0. I'm going to miss you little guy! 