Hello, I'm new to this forum so please excuse me if I'm posting this in the wrong pleace, but I just had a question about one of my bala sharks. Last week I bought 3 bala sharks, and I currently have them in a 10 gallon tank. I realize this tank is much too small, but I was misinformed at the pet store as to how much water they need, and I am going to get a bigger tank as soon as I can afford it. Last night, one of them began sitting at the bottom of the tank behind a fake plant and not moving. I didn't think anything of it, and decided to see how he was doing this morning. This morning he was in the same place, so I tried to scoop him up with a net to see if he was dead. When I did this he began swimming away and all around the tank. He swam around with the other two for a few minutes after this, but eventually he went back to the same spot and just sat there not moving. I repeated the same thing, and the same thing happened every time. I have noticed that the other two fish will go over and nudge him a little bit, to try to get him moving I guess, but he will just stay there. Does anyone know what might be causing this or what I could do to help please?