Hi - Can anyone help. I am new to keeping fish (4 months) and have 16 fish Danios, Guppys, Cherry Barbs and Glow lite Tetras. One of my Leopard Danios has been having trouble swimming for about a week now and hasn't eaten. Now he is just nose down in plants like he is tring to hide!! I perform a partial water change every week as my tank is quite small and I did try and get him swimming around today but he just darted about not really in control and just found another place to hide his head so to speak. Does this sound like a problem with his swim bladder? All my other fish are acting normal. Sould I leave him and see what happens but it's been a week now and although he's moving his body he doesn't actually swim anywhere just stays face down at the bottom of the tank. I don't want to take him out if there is a chance he will recover but I don't like to see him like this either.