too bad you cant get the fire eel man. mine is about 11-12" long and hes a beauty (Sloan) the only downside of him is he eats so much. Hes been rased on bloodworms, ghost shrimp, and earthworms

Use egg-crate fitted to the inside lip of the top rim of your tank and weight it down and you'll pretty much be guaranteed of no escapes. That is of course that your eel or ropefish is to big to fit through the holes. LOL Egg-crate allows your tank to breathe unlike glass tops.