Chromis School

[chewie]

I read somewhere to keep them in odd numbers. 3-5-7 ect...Not sure why but seems to work for me. I have 5 in a 90g reef and no problems. I actually took two out and put in my other tank(100g) and the three had no problem and the two together did seem to fight a little. I put the two back in the 90g and the other 3 seemed so excited to see them. Swimming around like crazy and "greating" them. No problems at all.
They are green chromis by the way. I was thinking of adding some blue chromis to the mix to see what happens.