Iffrat;3463884; said:i have 3 jags in a 55 and a bgk in a 30 gal .. but both are grow outs so its ok to keep small fish in a small tank ..
If I am reading this right, its ok, because you did it?
I don't think I would put a BGK in a 30 for anything more than about 2-3 weeks. They simply need more space. Keeping one in a 30 for any significant amount of time is asking for the fish to stunt.

That said, he also had more personality than ought to be allowed by law. My Greenies definately got their fair share of being pushed around by the Bluegill, but when I planted the tank even more heavily, everybody seemed more at ease. I think most Sunfish varieties enjoy LOTS of PLANTS!