I think you would have to consider a glass top of somekind as allthough your tank is rimmed around the edges (thats for a condesation tray I think) some fish can jump quite high and may be able to jump hlf the length of a typical tank.
Havent had an experience with these but they very stylish in action,
You could up the Wattage of the lighting in your jewel, thats what I am gonna do when I have some spare cash