Hello, I’ve had my rainbow shark for about a month now in a ten gallon tank (that’s all I can afford right now) with a tiny little catfish as a bottom feeder. My rainbow has always been brightly colored, but he’s always hiding in a little log statue I bought for him. As of a week and a half ago, he’s been swimming around the tank more, but two days ago I saw that hr looked ill. His back looks crooked and he looks too skinny, and the catfish is looking very plump. He’s still brightly colored, but today it seemed like he can’t swim very well and will only lay at the bottom of the fish tank without moving. How can I encourage him to eat?