I got two peppered Cory three weeks ago to go in the tank with our male betta. Everything was fine for about a week and one day I came downstairs to find one of them on their side. He looked like he was dead but when I looked properly he was breathing! Since then he moves around slightly but lies on his side and can't get back up. Tonight my partner used a net to gently turn him back on his front and we noticed that his fin on his left side (is that what you call them?!) is at an odd angle and doesn't move. As far as we know the betta hasn't attacked him and the other Cory is absolutely fine. We moved him into our hatchery but aren't sure what to do as he cant get himself up to eat properly. Does anyone have any advice on what we should do? Should we leave him in the hatchery and see if he gets any better when he's separated from the other two fish?