Asprotilapia leptura feed mainly on algae, and they prefer some rockwork.
Because it's a biparental mouthbrooder it will form pairs which goes hand in hand with some level of agression against other fish from the same species.
In a tank of 1.50m you would be able to keep about three pairs depending on the decor.
Just like with the flavipinnis, the less specimens you keep the higher the level of agression, though the agression is not like the terrorspree of any Lamprologine.
I thought I had read about a study on the diet of this specie on this forum but I can't find it.
The study basicly showed that the leptura feeds more on algae then Tropheus, and thus is very sensitive to bloat.
Also, Thomas wrote a wonderful article on this specie.http://www.cichlidae.com/article.php?id=361