Hej Inka, jag skulle köra 3 arter i ett 240:

Labidochromis sp. "perlmutt"
http://www.cichlid-forum.com/profiles/species.php?id=741
Pseudotropheus saulosi
http://www.cichlid-forum.com/profiles/species.php?id=1
Aulonocara jacobfreibergi "otter point"
http://www.cichlid-forum.com/profiles/species.php?id=1383