[teddscau]

I personally use Current USA with eggcrate on top of it. That way we don't have to worry about reduced lighting. You could also try putting a couple of panels of plexiglass over the tank. The light can get through, and the fish shouldn't be able to jump out. You might want to try adding more visual barriers for the fish (overhangs, caves, strategically placed macroalgae) so they can feel more secure. It's a pain in the butt when fish keep trying to kill each other, but providing a stronger sense of security should help to reduce stress in both the bullies and the victims. Could you maybe post pictures of your current setup so we can get a better idea of why your fish might be so stressed?

I have certificates in animal training, enrichment, behaviour, psychology, etc., so I might be able to help. Oh, and what do you feed them? One of the top causes of stress and behavioural issues in captive animals is due to how animals are fed.