send them all back and start over the tanks, to small for auratus and too small for that many mbuna and should not pair mbuna 1m3f, electric yellow are too docile for those mbuna, Green terror too agresive for those mbuna, south american fish should not be mixed with african riftlakers, what the gt doesn't kill the auratus will,
Of course the other thing you can do is buy more/bigger tanks, this is what i did I started fishkeeping up quite well screwed but bought some tanks moved my fish around and now operate relatively stable relatively stable thanks to some internet research and good advice here