been there, done that Joe
kept powder blue, brown and black together.
kept for a couple of months and they were constantly slashing one another. but the brown is more peaceful for my case.
3 died till from ick after i raise salinity from hypo for 2 months with 1~2 ppt per few days.
IMO, you can try but its very and extremely unlikely they wont fight. i wont want a battle arena everytime i see my tank. now, im just happy to have one, my AT. but i got to admit, sometime its tempting for me to get a blue one, perhaps i will try if i see a nice small hybrid blue