steve the two big silvers in there grew up with them and they dont even pay them or the rotkiels any attention, but I put in 3 other silvers the same size a few months back to add to the group and they killed them immediately

I dont understand it but now since they have become bigger they will not tolerate any additions to that tank.....main reason I recently had to buy two more giant tanks over the past 6mths...I have a mass group of baby azuls and others that are gonna need a place to go and I wouldnt risk putting them in the orino tank...the big azul resides with them but that is the only other pbass in that tank with them.