I have three white cloud mountain minnows in a twenty gallon tank- two males and one female. The males seem to flare at each other and the bigger one appears to chase the female around the tank. I plan to add six more minnows later on in stages but I don't want to ammonia level to spike if I add too many. Also, I now realise I should have asked for two females and one male at the pet shop but I was exited and wasn't thinking strait at the time. Anyway, I'm rambling and new to all this. Do you think there is a possibility my female minnow is pregnant? If so, should I treat her differently?