Bellow are some images of 2 areas that I believe my Peacock Eel I'm getting tomorrow could escape from. The first image is a small opening about 2-3 inches from the waters surface where the heater cords come in. I want to know if he could slither on up and out of there. The second image is a small gap between the filter pump and the lid of the tank. If he does get onto the filter he could get into the area where the filter box sits and get out through the lid if he really pushes hard. Let me know if you think either of these holes should be plugged.