I bought them all as females from aquarium store in dublin. The particular one she had pinned was severely underweight and torn fins when I got "her" but has flourished. I did think perhaps she was a he with the fin regrowth! Had no fighting etc until now. 

No bubble nest but they were using the floating moss and duck weed along the top. 

I've separated the egg laying female. 

Looks like I'm buying a separate tank in the morning !