Hello I really need help with my tiger shovelnose I have had him for about one week and he has not ate anything but seemed to do pretty good but recently he has been always been at one spot of the tank but at the top at first I thought of oxygen levels so I but a bunch of air bubbles in the tank but he has still been at the top for about 2-3 days I have a red tail catfish that stays at the bottom but is breathing well and 3 Oscar’s that are doing fine