Well, my 2 guys have been growing at at more or less steady rate (sorry no pics yet) with the larger pushing 4" and the smaller one probably around 3-3.5and much slimmer. Living in their temporary 30G grow out tank, each seems to stick to its own corner. They are like two boxers in the ring --whenever they meet in the middle, a bit of fighting takes place. I don't see any damage, and they don't seem to be actively pursuing one another but I was wondering: I know that they are solitary animals in nature. Do they grow less and less tolerant of counterspecifics as they mature? Considering their sendentary behavior, I don't see how they would openly seek confrontation but who knows...? I hope to be able to manage them in a 125G aquarium when they put on some size. Will they coexist or should I start considering which one to give up?