I compromised, had a brand new net breeder in a box (which I've probably had for 10 years.) I put the female that was off by herself in it. Now the other female is chasing the male around. These guys are a hoot, and I didn't have enough live plants so I had a few sinking base pennplax silks in another box and I rinsed and dropped in, made an obstacle course. I hope they don't kill each other. The dominant female's whole underside was bright red last night when I was netting her enemy...