They regularly swim to the bottom of the tank and steal the sinking food meant for my Corydoras. Because of this, I can't tell if they are just completely stuffed and bloated from overeating, or if this is a sign of an illness (like dropsy or parasites). One passed way today and its belly looked like this.
Update to add info: I got the tetras two weeks ago.
Parameters:
Ammonia: 0
Nitrite: 0
Nitrate: 2
Gh: 7
Ph: 7.4
Posted by Suhee