Newbie - goldfish blowing bubbles.....??? Ok, I am new at keeping fish. I've done a lot of research, and then I got my first goldfish, a fantail, about 2 weeks ago. She's been doing great, but now she's been doing something kind of odd. At night and in the morning, I'll wake up to hear little soft popping noises from her tank. She won't do it while i'm watching her, but I've been spying on her and she is going up to the top sides of the tank and maybe...blowing bubbles? popping bubbles? spitting out bubbles? I'm not exactly sure. There ARE a bunch of bubbles collecting around the top sides of the water....Is this normal, and does anyone know what she's doing or why? I just want to make sure she isn't sick or anything. THANKS!!!