I'm just reporting my personal experiences with the 6-line.
Do some searches on google or RC. There are lots of people who have the same experiences I've had with 6-lines in small tanks.
I'm not saying you should NEVER buy a 6-line. I'm saying MINE went nuts and when I started researching WHY, I found a lot of reports from other people who had 6-lines in small tanks and they had the same experiences as me. 6-lines have the POTENTIAL for being aggressive in small tanks if there are no other fish big enough or aggressive enough to slap the 6-line around a bit and keep it in line.
If you're having success with a 6-line in a small tank--call me jealous. Wish mine was "normal". But I just cannot, in good conscience, recommend a 6-line to anyone with a small tank. Take that advice for what it's worth and make your own decisions. :twocents: Do some research. Don't just take my word for it that they can be evil. Don't take the word of just one person who says they are perfectly behaved angels. Do the research first. I took the word of other reefers without doing any research first and I ended up with trouble.