i would suggest don't stress your lovely P.B. Off the lights inside your tank, i prefer you don't switch it on. leave them, don't watch them eat, they will do great, i had my 2 monoculus having same problem, now they eat everything while the lights off and im away, they growing fast and healthy. try give it a shot, all the best.=)
I think my 2 bigger guys eat At night tooltip with no light. My smaller ones go bananas during day. I had 4 feeders left in my tank last night and this morning all gone. Smaller bass would if gas a guy in them but didn't see any. Must of Been my2 larger that I haven't seen kill.