I know very little about fish since Bobin and Ping Pong (named by my daughter) are my first... Bobin got himself stuck between his tank wall and the pump. I cleaned the tank last night and this morning I checked and he was missing, I assumed he was in the cave, as I turned I saw orange and thought he had come out for food, but he had gone and wedged himself in a gap 1cm wide (less than half an inch) I moved the pump instantly and he was still alive but now he swims funny (like he has no balance) and doesn't want to eat, and stays in the cave. (Just checked on him at lunch time and he was still alive. WHAT CAN I DO I would hate to lose him...