I have 4 tats 10in w 2 armatus 6in, eating frozen, in a 265. had my tats first. If i had armatus first i would not have added tats. my armatus are way more teritorial . each takes a side of the tank and they rarely shaol w the tats. also have 5 red hook and 5 blk bars to keep them busy. they have been ok so far......good luck