What's the most N. brichardi-like species that you can think of (in terms of appearance) that isn't so successful at breeding and defending broods in the home aquarium that it ends up taking over all the rockwork in the aquarium? (I guess maybe I should have stated my interest as being in finding N. brichardi LIGHT rather than something N. brichardi-like. ;^] ) I assume N. pulcher is every bit as bad at taking over the tank. What about N. gracilis? Or N. marunguensis? Or would I have to go even further afield?