I have a 10 gallon tank with 2 reg wag platies, 2 black mollies, 2 scissortail rasbora and a upside down catfish. The catfish doesn't move. He stays under the filter. I moved it enough to get him away from it because I was afraid he was stuck to it. As soon as I moved it away from him he darted to the other side of the tank and hide in the plants. No sooner did I get the filter back in it's place and the lid back on the tank he was back under the filter. I'm afraid he's not even moving to eat. Any ideas on why he's staying under the filter? If I can do anything for him?