I just started a sorority last night! I'm loving it so far and now have 3 of my 5 girls following me around LoL! I was worried my bigger girl that I've had for about a month would get nasty with the smaller gals but she swims right by them. There doesn't seem to be any problems so far. I sure hope it stays that way! Snap some pics of your girls before you add them to the tank. I wish I would have with mine because I found a lavender one and she hides so much right now there is no way I can show her off hmph.