escaping moray

[reefnut]

well ive just picked up a snowflake.From what ive heard and read my setup will make a pretty good home.My question to those of you with eels is how big a concern is escape attempts?And is there anything i can do to keep him from wandering out of the tank?My tank is more function then fashion so things hanging out all over so i cant really put a tight lid on it.

Thanks in advance.