I had 'head and tail lite' Tetras in with Kenyi's and JD, they are totally fine. The Kenyi only went after other cichlids any way! Also have a chinese algae eater and a group of cory's, 3 yoyo and polka dot loach's. I have put the Kenyi in their own tank, due to aggression. Everybody else in that tank now get along 'swimmingly'!