On Tuesday I sold my large dat and moved the three smaller (3-6") uaru from my 3' into the 4' tank with the two larger (6" & 7")ones that were living with the dat, ornate, red head severum and 9 big clown loaches. There was some initial scrapping, but by Wednesday I couldn't tell which of the 3 ~6" ones came from where. On Thursday I noticed the larger one and one of the others getting cosy and digging in the corner, so I gave them a big rock to clean. By Friday they seemed like a close pair and were pushing the other fish away, except for the big ornate who they ignore, and he ignores them and just goes where he pleases.
Tonight we came home from a movie and Hannah noticed the two were being very defensive of their corner, and what do you know...
8)