Could be a swim bladder injury. Traumatic and since it's so thin not due if it'll make it. See if you can get it upright with decor or plants and reduce the water. This will help. Use a qt tank if available. Clean water and pray it gets better.
I lowered the flow in the tank by a lot.. He's found a spot under some wood that allows him to kinda stay upright... Should I do a big water change?