My boyfriend, who is too lazy to log in and post this himself, has a problem. His comet goldfish (in a 35 gallon tank) developed pop-eye and then about a week and a half later it developed this pimple-like spot near his eye. It looks like a pimple with lots of puss and is quite large. Does anyone know what it is or how to treat it? Thanks, from my lazy-a$$ed boyfriend, James.