I'm sure he's sick. I woke up and fed him. Saw this. He's been having a hard time swimming and now it looks like his head is caved in. This happened overnight. He was fine yesterday. Does he have a sickness that is contagious to the other fish?
pH between 7.2 and 7.6
Ammonia 0ppm
Nitrite 0ppm
Nitrate 0ppm
pH between 7.2 and 7.6
Ammonia 0ppm
Nitrite 0ppm
Nitrate 0ppm