So I have a foot long jardini shipped to me. I put him in the tank yesterday. He was swimming just fine. At the end of the day I turned the lights off and noticed he immediately started to swim with a tilt. I come to see today with or without the lights on. This seem to stick in his behavior. Alos he only does this slight tilt twards the viewing area of the tank. Even if I am not in his sight. Anyone? Help? Water params are great. I have plenty of experience with arowanas but never seen this before.