Hello guys i got a Dog face in my QT tank. Hes been in there for 9 days now. I woke up this morning to see him swollen by one of his fins. The water quality is good but there are high nitrates. He has been doing great and still is eating. I been feeding him Formula 1 and Formula 2 Flake food, Mysis, and Krill. Anybody know what this is? What could of caused it? What can i do for him? the temp is at 75 degrees right now.