BGK are pretty peaceable critters, but I'll tell ya, my head/tail light tetras disappeared one by one when in the same tank . .. . . .a bgk's mouth can open W-I-D-E. Unless it's a little two-inch juvie, which will give the tetras time to grow full size. The brown is an African brown knife, whereas the bgk is Amazonian, but my two just get along fine, coco usually just stays away as bgk is much, much larger. You could get some horseface loaches--I have a herd of five juvies--they get around 6 inches. Lots of personality. Think I"ll put them in my 125 with the severums. . .
