I had a similar situation with my pair. Each time they spawned (and after I removed the eggs) the male would relentlessly pursue the female. She managed to keep enough out of harms way to avoid serious injury until they were ready to spawn again (about 2 weeks apart). This repeated three times. After the fourth spawn she was taking more of a beating than usual, so I moved her to another tank for recovery. After a week or so, when I felt she was back to normal, I moved her back. A day later, I found her dead. I'm not sure what happened to her. She may have been killed by the male, but actually, there was little damage showing. I think in order to maintain this species properly, a large tank is required , quite a bit larger than the 90G that I had the pair in. Also, keeping the numbers up (6+), providing plenty of structure for "safe havens" , and keeping the group together and stable (don't separate and re-introduce) is the way to go. I have, just as you Duane, inadvertently made matters worse by removing and re-introducing fish. Having a couple of other damba species (kieneri, dambabe) in there might be advisable too. I'll try this with the young 'uns coming up. Also, I believe that raising them up together from a young age can improve things in quelling aggressive tendencies.
