I use no glass top. It is a pain to move and needs frequent cleaning to prevent salt buildup, which then diminishes the the light penatration.
Some people have had success with using chrome and white eggcrate, which actually increases light reflection in the tank. It is still a pain to remove all the time.
To prevent fish from leaping out, I use eggcrate on the back of the canopy to keep the jumpers in the tank. Granted, you must have a canopy for this to work. Do you have a canopy, or suspended lights above the tank?