So i just got 6 new pygmy corydoras for my 10 gal tank and i was just wondering if there were any signs or things they might do if they are not doing so great. I know that if there is not enough oxygenation in the water then you will see them go to the top and and almost bite at the air, which mine were doing so i lowered the water more so that the water from my filter had more of a flow which seemed to help. But is there any other behaviors i should look of if something is going on?