I'm new to this, so I'm not sure what to expect. I have 1 male Betta with 4 female Bettas in a 10g tank. At first I was worried that my male (Nemo) would be overly aggressive towards my females, but after separating him for a day he's being a good boy. My issue is my girls ~ they are fin-nipping really bad. I was told that they will do this to establish their pecking order but how do I know if it's going too far or if I need to separate them?