Thanks! I won't have a problem of fish eating other fish lol I'm looking for mostly nano fish. Wouldn't 3 males show aggression? And are females different color wise than males or are they both pretty vibrant?
Males can be territorial. That is why broken lines of sight and plenty of room for more than one territory is important. In that tank you will be ok with 3 males. Maybe try and have some higher up plants for them to hide in as well. 3 males will be ok in 5 gallons. Females are very very drab.