well im not to sure about what happened to my favorite guppy still. but his symtoms were foggy eyes. looked like his mouth was swollem an he couldnt eat. an he seemed blind. i watched him swim into stuff. an when i taped on the tank( i know shame on me but i wanted to see if he was healthy enough to react) he swam straight into the side an looked like he cept swimming into it. i really wanna know whats wrong with him. sence then none of my other guppys have shown any symptoms of it but im still currius.