These plants are pretty and delicate looking, they have a compact shape to begin with but with time they stretch out and become leggy.
Watering must be very consistent. Yellow brittle leaves indicate under watering, blackish tips on green leaves indicate over watering. If the environment of this plant remains constant, water regularly every week, or every other week, depending on how the topsoil feels.
If a bushy appearance is desired keep new growth pinched out.