Hello. My young 2" (not including tail) comet is currently experiencing what I believe to be buoyancy issues. It is not as severe as him being flipped upside down and unable to get up. Instead, he is often swimming tilted at a roughly 23 degree angle, if that makes any sense. He is right now in an undersized tank (20 gallons) but his upgrade of 55 gallons is currently in the house and we are waiting for the filter. I suspect that it may be because he has been gulping air. I do not know why he gulps air. He does not stay at the surface for long, like a gasping fish, and we have a bubbler in his tank after I first discovered he was not getting enough oxygen. After adding the bubbler, his breathing underwater has been less strained and he is more active. I think he is getting enough oxygen, so I do not know why he gulps air. I also do not feed floating food, so I do not think he is begging either. Is his tilted swimming swim bladder disease, or is it not something to be worried about?