I was just reading through some of my posts and figured I'd update this one. We did get the six line and he has been great. Everyone gets along fine. The maroon is still a sweety, although she redecorates her space occassionally and if I place something in her area she will remove it. The other day I was removing some algae and a tuft drifted into her area - she grabbed that piece, swam it out and put it in my hand! None of the residents in the tank bother each other and the copperband (only new addition since this previous post) actually feeds the cardinals, or at least thats the way it appears.