When my green terrors bred the female kept a small circle of protection around the batch and the male a larger circle. I have kept pictus cats, tiger barbs, blue gourami, and red hook mets with them at different times without issue. I do not keep pictus cats with them if they are breeding or someone will get hurt. They never had any issues with the dithers and never killed anything even when they had fry. My pair liked the smaller tank more it seamed, they only would use half of the 125 and bred better in the smaller tank so I moved them back to my 60. Now I only have the male, 4 blue gourami, and a couple other dithers in the 60, my 125 has become a grow out tank for now.