I would consider the options listed here:
http://www.cichlid-forum.com/articles/c ... er_20g.php
or here:
http://www.cichlid-forum.com/articles/c ... er_29g.php
http://www.cichlid-forum.com/articles/c ... er_20g.php
or here:
http://www.cichlid-forum.com/articles/c ... er_29g.php