Columbian red fin tetras

[ganesan]

I just bought 6 Columbian red fin tetras this evening and they are doing great. Guess they are in good condition and will soon be with my discus. They are swimming in a shoal and are having attractive red fins with silver body.
But I read they can be semi aggressive and bully smaller fish and nip their fins. These tetras are about an inch long and don't seem aggressive. I think time will tell. Does anyone have any experience with these red fin Columbian tetras.