I was checking one of my spare pumps worked and it was a little to powerful for the 5 gallon tank and ended in a storm of swirling bubbles and substrate going everywhere, so I removed it but I think my cory has swallowed a bubble of air and now seems unable to leave the surface. He has wedged himself against my moss wall so that he is no longer at the surface but still seems un willing and unable to move. He is floating upside down and I am not sre what to do to help him is there anything I can do?