O she Killed the tetras and no aggression between the hybrid and they are opposite sex!Nipping at the tetras isn’t too concerning. They heal really fast and can take a hit (as long as they aren’t killed). My jd would regularly nip at the tetras but has slowed down with some size.
If the eating stopped when the new cichlid went in, I’d bet it’s stress related to that. It will adjust unless there is too much aggression (which is possible - you don’t always see it).
Although this makes me think about if I took him out maybe it would change but I plan on moving her to a 75 and adding additional cichlids maybe 2 so I mean she needs to get over it!
But will she because if not I will have her solo then in this tank and then get all babies for my 75gal. What else do I do!!! Like I said I tried beef heart seriously that’s me sinking low on food for my fish I like to feed healthy!!!