Cyperus helferi is a long, light green aquatic plant in a roset shape that doesn't thrive by runners like for example Vallisneria species or Cryptocoryne crispatula var. balansae. It is more easy to control because it doesn't spread to unwanted areas in the layout.
When placed in an area of your aquascape with a nice water flow it forms a nice curtain that shows a beautiful movement effect.
It's advised to use medium light intensity and CO2 to grow this plant in the best conditions.