Okay so I have a very pretty blue male betta fish that was very active and showy when I first got him. But here recently he has been still and lifeless when I walk into my room. He doesn't eat anymore he just hangs out at the bottom of the tank. I don't want him to die or anything and it makes me so sad when I read about how hungry and fun everyone else's fish are. I feel like a failure as a owner and I want him to survive so how the heck do I make him better he isn't swollen and i change his water every other day somebody please help me!!! Oh and I used to have another red male one in the same tank but with a divider and he died but that was a couple months ago. I don't know what to do. I don't know if it's his water or what