Got a problem with my betta. We've had him about a year and in the last week or so, he's developed a bit of a problem. His stomach is distended/bloated and he won't swim. He lays at the bottom of his bowl almost on his tail. He still has an appetite and attempts to swim to the top when I drop in some food. However, he usually ends up catching it on the way down. He had been in a 10 gallon aquarium with a couple of other fish but I've since moved him to a bowl by himself. Any ideas what's wrong with him?
RP

