Hi guys, can I ask if anyone has the experience of keeping Chromis' of a different batch? I had recently gotten Chromis(x4) from a nice reefer and I think that they are really nice to have as they swim in schools. I was thinking of buying 2 more Chromis' to add them to the school of 4 to make the team 6 strong, however there was a predicament. Will the four that are already in the tank be aggressive over the new batch that I add in and causes them to finally 'Mati'? Can someone who has experie