Noticed one of the flame tetra with a white mouth and missing an eye on the other side. Tank is 40 gallons and fish have been in for a month. Stocking is 9 flame tetra, 14 cardinals, 3 otos, 6 panda corys, 1 bolivian ram, and a pair of keyhole cichlids. Flame tetras occasionally chase each other, and the ram will sometimes chase a keyhole away from food, but no other signs of aggression in the tank. Causes/advice please?
Posted by Rhombic_Note