Here is a video of my dovii juvees, wondering when to seperate them before they get too aggressivethey range between 1.5" and 4.5". There are 9 of them.
https://www.youtube.com/watch?v=9Gx7xhWnK1U&feature=youtube_gdata_player
https://www.youtube.com/watch?v=9Gx7xhWnK1U&feature=youtube_gdata_player