For the past 3 days, my little fish has been gasping for air at the surface. He will hang in one spot for hours and I see he is breathing rapidly. He has a heater and I just put in a filter yesterday. I know they get oxygen from the surface, but it seems he is having trouble breathing Yes, I know he has popeye and I’m the process of trying to treat it. I’ve included some photos of the way he floats. Why could he possibly be breathing this way? His issues kind of all came at once out of nowhere. I’m really worried that I’ll lose him and I’ve been trying to get as much advice as possible on here (hence why I post often, so if I get annoying..I’m sorry, I’m a newbie).