Just my luck. it turns out Ella is a boy. I have seen the proof, lol!
Anyhow Sam is a girl and they have been co-habitating since December now and I hace had no issues with aggression. I have seen Ella fluter and since I thought he was a she I assumed it was agression but it never progressed to biting or fighting of any kind so I brushed it off. I am assuming now that the fluttering is an attempt for Ella to Get Sams attention in hopes to mate.
My question is what are the possiblities of aggression if Sam is unwilling? Can a male and female live in the same tank happily? Im not sure of ages but I have owned Sam for 2 years this October (bought from petshop) and she is now 4.5 inches, and owned Ella a year in December (bought second hand) and he is approx 4 inches, so I cannot say fo sure if they are sexually mature. Sam has not yet laid eggs. I have noticed at lot more fluttering though and Ella showing his manly parts more frequesntly (hence the realization).
Any information or suggestions you can offer for male and female co-habitation would be wonderful! I really dont want to get rid of either one and they have lived well together this far.
Thanks!

