Ok, so I just got a baby arowana about 2 days ago. He's about 3 inches. He ate a couple guppies like 20 minutes after I put him in the tank. Everything seemed fine. Well he was in a 75 with my baby CKF and they didn't seem to get along. So I got a 20 gal and set it up for him. He's been in there for about an hour but he was like flaring his gills or it kinda looked like he was stretching his mouth real quick. Then he stopped so it seemed fine again. Now he just puked up a little bit of white stuff. I'm not TOO worried. I'm just making sure I don't NEED to be