My white ribbon eel managed to get into the back of my bio cube. He is at the bottom of a deep narrow section where the aquarium water come in before being filtered. Waited overnight to see if he could find his way back but he is still there. Often see him trying to reach over to get back but cant make the jump. Have tried scooping him out with all kinds of utensils but he is so long he just slips back into the chamber. Afraid he might die back there if from nothing else just because he cant swim around or move much. Any clever tricks to scoop him out?