
This morning I woke up to my red tiger severum with his left pec fin clamped to his body. I recently had to add a smaller salvini to the tank which the severum has been chasing around the tank the past couple days, until today when I noticed he stopped chasing and now has this clamped fin. Could it be an injury from chasing or from the stress from addition of new fish. Parameters are good ammonia and nitrite 0 nitrate 10. All other fish in tank are ok