All in all you will have to weigh out which is more stressful, trying to divide them to feed or a few nips that sound fairly typical and not super harmful. IMHO I would most likely not use the divider unless absolutely needed. I am currently using in my grow out for a life and death situation.They are in a 40gal grow out rank right now. I am still working on my 100gal set up. And awesome! Thank you! I really have to regulate him. I have caught him twice now nipping at my other bichirs during feeding time. He doesn't do any damage... yet... O.O