mattbond
Fishaholic
depending on what you already have, you could have a pair of kribensis in there (they will breed)
or a pair/ trio of apisto cockatoos
or for a tank that size, i would go for a trio/quad of apistogramma borelli
or a pair/ trio of apisto cockatoos
or for a tank that size, i would go for a trio/quad of apistogramma borelli