I've always wanted to get some killis and i finally did, picked up a male and female.
They are actually doing really great in my 120. The female hides a lot. What a beauty!
They're in my planted 120 gallon community tank.
There's about 30-40 cardinal tetras, some white clouds, some yoyo loaches, etc. All peaceful species.
The only thing i am slightly concerned about is the female getting out-competed for food, but she seems to be holding her own and getting the scraps that fall past the crowd.
I was never intending for them to breed in the first place, and i imagine that they probably won't make the attempt in this tank.